21817750

素因数分解:

$2^1\times 5^3\times {\mathrm{197}}^1\times {\mathrm{443}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 41142816

約数和(自身を除く): 19325066

約数列:

[1, 2, 5, 10, 25, 50, 125, 197, 250, 394, 443, 886, 985, 1970, 2215, 4430, 4925, 9850, 11075, 22150, 24625, 49250, 55375, 87271, 110750, 174542, 436355, 872710, 2181775, 4363550, 10908875, 21817750]

約数ペア:

[(1, 21817750), (2, 10908875), (5, 4363550), (10, 2181775), (25, 872710), (50, 436355), (125, 174542), (197, 110750), (250, 87271), (394, 55375), (443, 49250), (886, 24625), (985, 22150), (1970, 11075), (2215, 9850), (4430, 4925)]