21785640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2557}}^1$

素因数の和:2642

約数の個数: 64

約数和(自身を含む): 66303360

約数和(自身を除く): 44517720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 71, 120, 142, 213, 284, 355, 426, 568, 710, 852, 1065, 1420, 1704, 2130, 2557, 2840, 4260, 5114, 7671, 8520, 10228, 12785, 15342, 20456, 25570, 30684, 38355, 51140, 61368, 76710, 102280, 153420, 181547, 306840, 363094, 544641, 726188, 907735, 1089282, 1452376, 1815470, 2178564, 2723205, 3630940, 4357128, 5446410, 7261880, 10892820, 21785640]

約数ペア:

[(1, 21785640), (2, 10892820), (3, 7261880), (4, 5446410), (5, 4357128), (6, 3630940), (8, 2723205), (10, 2178564), (12, 1815470), (15, 1452376), (20, 1089282), (24, 907735), (30, 726188), (40, 544641), (60, 363094), (71, 306840), (120, 181547), (142, 153420), (213, 102280), (284, 76710), (355, 61368), (426, 51140), (568, 38355), (710, 30684), (852, 25570), (1065, 20456), (1420, 15342), (1704, 12785), (2130, 10228), (2557, 8520), (2840, 7671), (4260, 5114)]