21550600

素因数分解:

$2^3\times 5^2\times {\mathrm{277}}^1\times {\mathrm{389}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 50415300

約数和(自身を除く): 28864700

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 277, 389, 554, 778, 1108, 1385, 1556, 1945, 2216, 2770, 3112, 3890, 5540, 6925, 7780, 9725, 11080, 13850, 15560, 19450, 27700, 38900, 55400, 77800, 107753, 215506, 431012, 538765, 862024, 1077530, 2155060, 2693825, 4310120, 5387650, 10775300, 21550600]

約数ペア:

[(1, 21550600), (2, 10775300), (4, 5387650), (5, 4310120), (8, 2693825), (10, 2155060), (20, 1077530), (25, 862024), (40, 538765), (50, 431012), (100, 215506), (200, 107753), (277, 77800), (389, 55400), (554, 38900), (778, 27700), (1108, 19450), (1385, 15560), (1556, 13850), (1945, 11080), (2216, 9725), (2770, 7780), (3112, 6925), (3890, 5540)]