21456080

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{4003}}^1$

素因数の和:4083

約数の個数: 40

約数和(自身を含む): 50642592

約数和(自身を除く): 29186512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 4003, 5360, 8006, 16012, 20015, 32024, 40030, 64048, 80060, 160120, 268201, 320240, 536402, 1072804, 1341005, 2145608, 2682010, 4291216, 5364020, 10728040, 21456080]

約数ペア:

[(1, 21456080), (2, 10728040), (4, 5364020), (5, 4291216), (8, 2682010), (10, 2145608), (16, 1341005), (20, 1072804), (40, 536402), (67, 320240), (80, 268201), (134, 160120), (268, 80060), (335, 64048), (536, 40030), (670, 32024), (1072, 20015), (1340, 16012), (2680, 8006), (4003, 5360)]