20123240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{293}}^1$

素因数の和:422

約数の個数: 64

約数和(自身を含む): 48580560

約数和(自身を除く): 28457320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 101, 136, 170, 202, 293, 340, 404, 505, 586, 680, 808, 1010, 1172, 1465, 1717, 2020, 2344, 2930, 3434, 4040, 4981, 5860, 6868, 8585, 9962, 11720, 13736, 17170, 19924, 24905, 29593, 34340, 39848, 49810, 59186, 68680, 99620, 118372, 147965, 199240, 236744, 295930, 503081, 591860, 1006162, 1183720, 2012324, 2515405, 4024648, 5030810, 10061620, 20123240]

約数ペア:

[(1, 20123240), (2, 10061620), (4, 5030810), (5, 4024648), (8, 2515405), (10, 2012324), (17, 1183720), (20, 1006162), (34, 591860), (40, 503081), (68, 295930), (85, 236744), (101, 199240), (136, 147965), (170, 118372), (202, 99620), (293, 68680), (340, 59186), (404, 49810), (505, 39848), (586, 34340), (680, 29593), (808, 24905), (1010, 19924), (1172, 17170), (1465, 13736), (1717, 11720), (2020, 9962), (2344, 8585), (2930, 6868), (3434, 5860), (4040, 4981)]