21952980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:179

約数の個数: 216

約数和(自身を含む): 82162080

約数和(自身を除く): 60209100

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 49, 57, 60, 63, 70, 76, 84, 90, 95, 98, 105, 114, 126, 131, 133, 140, 147, 171, 180, 190, 196, 210, 228, 245, 252, 262, 266, 285, 294, 315, 342, 380, 393, 399, 420, 441, 490, 524, 532, 570, 588, 630, 655, 665, 684, 735, 786, 798, 855, 882, 917, 931, 980, 1140, 1179, 1197, 1260, 1310, 1330, 1470, 1572, 1596, 1710, 1764, 1834, 1862, 1965, 1995, 2205, 2358, 2394, 2489, 2620, 2660, 2751, 2793, 2940, 3420, 3668, 3724, 3930, 3990, 4410, 4585, 4655, 4716, 4788, 4978, 5502, 5586, 5895, 5985, 6419, 7467, 7860, 7980, 8253, 8379, 8820, 9170, 9310, 9956, 11004, 11172, 11790, 11970, 12445, 12838, 13755, 13965, 14934, 16506, 16758, 17423, 18340, 18620, 19257, 22401, 23580, 23940, 24890, 25676, 27510, 27930, 29868, 32095, 33012, 33516, 34846, 37335, 38514, 41265, 41895, 44802, 49780, 52269, 55020, 55860, 57771, 64190, 69692, 74670, 77028, 82530, 83790, 87115, 89604, 96285, 104538, 112005, 115542, 121961, 128380, 149340, 156807, 165060, 167580, 174230, 192570, 209076, 224010, 231084, 243922, 261345, 288855, 313614, 348460, 365883, 385140, 448020, 487844, 522690, 577710, 609805, 627228, 731766, 784035, 1045380, 1097649, 1155420, 1219610, 1463532, 1568070, 1829415, 2195298, 2439220, 3136140, 3658830, 4390596, 5488245, 7317660, 10976490, 21952980]

約数ペア:

[(1, 21952980), (2, 10976490), (3, 7317660), (4, 5488245), (5, 4390596), (6, 3658830), (7, 3136140), (9, 2439220), (10, 2195298), (12, 1829415), (14, 1568070), (15, 1463532), (18, 1219610), (19, 1155420), (20, 1097649), (21, 1045380), (28, 784035), (30, 731766), (35, 627228), (36, 609805), (38, 577710), (42, 522690), (45, 487844), (49, 448020), (57, 385140), (60, 365883), (63, 348460), (70, 313614), (76, 288855), (84, 261345), (90, 243922), (95, 231084), (98, 224010), (105, 209076), (114, 192570), (126, 174230), (131, 167580), (133, 165060), (140, 156807), (147, 149340), (171, 128380), (180, 121961), (190, 115542), (196, 112005), (210, 104538), (228, 96285), (245, 89604), (252, 87115), (262, 83790), (266, 82530), (285, 77028), (294, 74670), (315, 69692), (342, 64190), (380, 57771), (393, 55860), (399, 55020), (420, 52269), (441, 49780), (490, 44802), (524, 41895), (532, 41265), (570, 38514), (588, 37335), (630, 34846), (655, 33516), (665, 33012), (684, 32095), (735, 29868), (786, 27930), (798, 27510), (855, 25676), (882, 24890), (917, 23940), (931, 23580), (980, 22401), (1140, 19257), (1179, 18620), (1197, 18340), (1260, 17423), (1310, 16758), (1330, 16506), (1470, 14934), (1572, 13965), (1596, 13755), (1710, 12838), (1764, 12445), (1834, 11970), (1862, 11790), (1965, 11172), (1995, 11004), (2205, 9956), (2358, 9310), (2394, 9170), (2489, 8820), (2620, 8379), (2660, 8253), (2751, 7980), (2793, 7860), (2940, 7467), (3420, 6419), (3668, 5985), (3724, 5895), (3930, 5586), (3990, 5502), (4410, 4978), (4585, 4788), (4655, 4716)]