21308680

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7951}}^1$

素因数の和:8029

約数の個数: 32

約数和(自身を含む): 48666240

約数和(自身を除く): 27357560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7951, 15902, 31804, 39755, 63608, 79510, 159020, 318040, 532717, 1065434, 2130868, 2663585, 4261736, 5327170, 10654340, 21308680]

約数ペア:

[(1, 21308680), (2, 10654340), (4, 5327170), (5, 4261736), (8, 2663585), (10, 2130868), (20, 1065434), (40, 532717), (67, 318040), (134, 159020), (268, 79510), (335, 63608), (536, 39755), (670, 31804), (1340, 15902), (2680, 7951)]