20290520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{563}}^1$

素因数の和:644

約数の個数: 64

約数和(自身を含む): 49338720

約数和(自身を除く): 29048200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 53, 68, 85, 106, 136, 170, 212, 265, 340, 424, 530, 563, 680, 901, 1060, 1126, 1802, 2120, 2252, 2815, 3604, 4504, 4505, 5630, 7208, 9010, 9571, 11260, 18020, 19142, 22520, 29839, 36040, 38284, 47855, 59678, 76568, 95710, 119356, 149195, 191420, 238712, 298390, 382840, 507263, 596780, 1014526, 1193560, 2029052, 2536315, 4058104, 5072630, 10145260, 20290520]

約数ペア:

[(1, 20290520), (2, 10145260), (4, 5072630), (5, 4058104), (8, 2536315), (10, 2029052), (17, 1193560), (20, 1014526), (34, 596780), (40, 507263), (53, 382840), (68, 298390), (85, 238712), (106, 191420), (136, 149195), (170, 119356), (212, 95710), (265, 76568), (340, 59678), (424, 47855), (530, 38284), (563, 36040), (680, 29839), (901, 22520), (1060, 19142), (1126, 18020), (1802, 11260), (2120, 9571), (2252, 9010), (2815, 7208), (3604, 5630), (4504, 4505)]