21191940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{139}}^1$

素因数の和:183

約数の個数: 216

約数和(自身を含む): 81332160

約数和(自身を除く): 60140220

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 28, 30, 33, 35, 36, 42, 44, 45, 55, 60, 63, 66, 70, 77, 84, 90, 99, 105, 110, 121, 126, 132, 139, 140, 154, 165, 180, 198, 210, 220, 231, 242, 252, 278, 308, 315, 330, 363, 385, 396, 417, 420, 462, 484, 495, 556, 605, 630, 660, 693, 695, 726, 770, 834, 847, 924, 973, 990, 1089, 1155, 1210, 1251, 1260, 1386, 1390, 1452, 1529, 1540, 1668, 1694, 1815, 1946, 1980, 2085, 2178, 2310, 2420, 2502, 2541, 2772, 2780, 2919, 3058, 3388, 3465, 3630, 3892, 4170, 4235, 4356, 4587, 4620, 4865, 5004, 5082, 5445, 5838, 6116, 6255, 6930, 7260, 7623, 7645, 8340, 8470, 8757, 9174, 9730, 10164, 10703, 10890, 11676, 12510, 12705, 13761, 13860, 14595, 15246, 15290, 16819, 16940, 17514, 18348, 19460, 21406, 21780, 22935, 25020, 25410, 27522, 29190, 30492, 30580, 32109, 33638, 35028, 38115, 42812, 43785, 45870, 50457, 50820, 53515, 55044, 58380, 64218, 67276, 68805, 76230, 84095, 87570, 91740, 96327, 100914, 107030, 117733, 128436, 137610, 151371, 152460, 160545, 168190, 175140, 192654, 201828, 214060, 235466, 252285, 275220, 302742, 321090, 336380, 353199, 385308, 470932, 481635, 504570, 588665, 605484, 642180, 706398, 756855, 963270, 1009140, 1059597, 1177330, 1412796, 1513710, 1765995, 1926540, 2119194, 2354660, 3027420, 3531990, 4238388, 5297985, 7063980, 10595970, 21191940]

約数ペア:

[(1, 21191940), (2, 10595970), (3, 7063980), (4, 5297985), (5, 4238388), (6, 3531990), (7, 3027420), (9, 2354660), (10, 2119194), (11, 1926540), (12, 1765995), (14, 1513710), (15, 1412796), (18, 1177330), (20, 1059597), (21, 1009140), (22, 963270), (28, 756855), (30, 706398), (33, 642180), (35, 605484), (36, 588665), (42, 504570), (44, 481635), (45, 470932), (55, 385308), (60, 353199), (63, 336380), (66, 321090), (70, 302742), (77, 275220), (84, 252285), (90, 235466), (99, 214060), (105, 201828), (110, 192654), (121, 175140), (126, 168190), (132, 160545), (139, 152460), (140, 151371), (154, 137610), (165, 128436), (180, 117733), (198, 107030), (210, 100914), (220, 96327), (231, 91740), (242, 87570), (252, 84095), (278, 76230), (308, 68805), (315, 67276), (330, 64218), (363, 58380), (385, 55044), (396, 53515), (417, 50820), (420, 50457), (462, 45870), (484, 43785), (495, 42812), (556, 38115), (605, 35028), (630, 33638), (660, 32109), (693, 30580), (695, 30492), (726, 29190), (770, 27522), (834, 25410), (847, 25020), (924, 22935), (973, 21780), (990, 21406), (1089, 19460), (1155, 18348), (1210, 17514), (1251, 16940), (1260, 16819), (1386, 15290), (1390, 15246), (1452, 14595), (1529, 13860), (1540, 13761), (1668, 12705), (1694, 12510), (1815, 11676), (1946, 10890), (1980, 10703), (2085, 10164), (2178, 9730), (2310, 9174), (2420, 8757), (2502, 8470), (2541, 8340), (2772, 7645), (2780, 7623), (2919, 7260), (3058, 6930), (3388, 6255), (3465, 6116), (3630, 5838), (3892, 5445), (4170, 5082), (4235, 5004), (4356, 4865), (4587, 4620)]