20911020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:144

約数の個数: 192

約数和(自身を含む): 71124480

約数和(自身を除く): 50213460

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 17, 19, 20, 26, 30, 34, 38, 39, 51, 52, 57, 60, 65, 68, 76, 78, 83, 85, 95, 102, 114, 130, 156, 166, 170, 190, 195, 204, 221, 228, 247, 249, 255, 260, 285, 323, 332, 340, 380, 390, 415, 442, 494, 498, 510, 570, 646, 663, 741, 780, 830, 884, 969, 988, 996, 1020, 1079, 1105, 1140, 1235, 1245, 1292, 1326, 1411, 1482, 1577, 1615, 1660, 1938, 2158, 2210, 2470, 2490, 2652, 2822, 2964, 3154, 3230, 3237, 3315, 3705, 3876, 4199, 4233, 4316, 4420, 4731, 4845, 4940, 4980, 5395, 5644, 6308, 6460, 6474, 6630, 7055, 7410, 7885, 8398, 8466, 9462, 9690, 10790, 12597, 12948, 13260, 14110, 14820, 15770, 16185, 16796, 16932, 18343, 18924, 19380, 20501, 20995, 21165, 21580, 23655, 25194, 26809, 28220, 31540, 32370, 36686, 41002, 41990, 42330, 47310, 50388, 53618, 55029, 61503, 62985, 64740, 73372, 80427, 82004, 83980, 84660, 91715, 94620, 102505, 107236, 110058, 123006, 125970, 134045, 160854, 183430, 205010, 220116, 246012, 251940, 268090, 275145, 307515, 321708, 348517, 366860, 402135, 410020, 536180, 550290, 615030, 697034, 804270, 1045551, 1100580, 1230060, 1394068, 1608540, 1742585, 2091102, 3485170, 4182204, 5227755, 6970340, 10455510, 20911020]

約数ペア:

[(1, 20911020), (2, 10455510), (3, 6970340), (4, 5227755), (5, 4182204), (6, 3485170), (10, 2091102), (12, 1742585), (13, 1608540), (15, 1394068), (17, 1230060), (19, 1100580), (20, 1045551), (26, 804270), (30, 697034), (34, 615030), (38, 550290), (39, 536180), (51, 410020), (52, 402135), (57, 366860), (60, 348517), (65, 321708), (68, 307515), (76, 275145), (78, 268090), (83, 251940), (85, 246012), (95, 220116), (102, 205010), (114, 183430), (130, 160854), (156, 134045), (166, 125970), (170, 123006), (190, 110058), (195, 107236), (204, 102505), (221, 94620), (228, 91715), (247, 84660), (249, 83980), (255, 82004), (260, 80427), (285, 73372), (323, 64740), (332, 62985), (340, 61503), (380, 55029), (390, 53618), (415, 50388), (442, 47310), (494, 42330), (498, 41990), (510, 41002), (570, 36686), (646, 32370), (663, 31540), (741, 28220), (780, 26809), (830, 25194), (884, 23655), (969, 21580), (988, 21165), (996, 20995), (1020, 20501), (1079, 19380), (1105, 18924), (1140, 18343), (1235, 16932), (1245, 16796), (1292, 16185), (1326, 15770), (1411, 14820), (1482, 14110), (1577, 13260), (1615, 12948), (1660, 12597), (1938, 10790), (2158, 9690), (2210, 9462), (2470, 8466), (2490, 8398), (2652, 7885), (2822, 7410), (2964, 7055), (3154, 6630), (3230, 6474), (3237, 6460), (3315, 6308), (3705, 5644), (3876, 5395), (4199, 4980), (4233, 4940), (4316, 4845), (4420, 4731)]