21002110

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{5399}}^1$

素因数の和:5795

約数の個数: 16

約数和(自身を含む): 37908000

約数和(自身を除く): 16905890

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 5399, 10798, 26995, 53990, 2100211, 4200422, 10501055, 21002110]

約数ペア:

[(1, 21002110), (2, 10501055), (5, 4200422), (10, 2100211), (389, 53990), (778, 26995), (1945, 10798), (3890, 5399)]