21000618160

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2531}}^1\times {\mathrm{6101}}^1$

素因数の和:8662

約数の個数: 80

約数和(自身を含む): 51727483872

約数和(自身を除く): 30726865712

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 2531, 5062, 6101, 10124, 12202, 12655, 20248, 24404, 25310, 30505, 40496, 43027, 48808, 50620, 61010, 86054, 97616, 101240, 103717, 122020, 172108, 202480, 207434, 215135, 244040, 344216, 414868, 430270, 488080, 518585, 688432, 829736, 860540, 1037170, 1659472, 1721080, 2074340, 3442160, 4148680, 8297360, 15441631, 30883262, 61766524, 77208155, 123533048, 154416310, 247066096, 262507727, 308832620, 525015454, 617665240, 1050030908, 1235330480, 1312538635, 2100061816, 2625077270, 4200123632, 5250154540, 10500309080, 21000618160]

約数ペア:

[(1, 21000618160), (2, 10500309080), (4, 5250154540), (5, 4200123632), (8, 2625077270), (10, 2100061816), (16, 1312538635), (17, 1235330480), (20, 1050030908), (34, 617665240), (40, 525015454), (68, 308832620), (80, 262507727), (85, 247066096), (136, 154416310), (170, 123533048), (272, 77208155), (340, 61766524), (680, 30883262), (1360, 15441631), (2531, 8297360), (5062, 4148680), (6101, 3442160), (10124, 2074340), (12202, 1721080), (12655, 1659472), (20248, 1037170), (24404, 860540), (25310, 829736), (30505, 688432), (40496, 518585), (43027, 488080), (48808, 430270), (50620, 414868), (61010, 344216), (86054, 244040), (97616, 215135), (101240, 207434), (103717, 202480), (122020, 172108)]