21405550

素因数分解:

$2^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{25183}}^1$

素因数の和:25212

約数の個数: 24

約数和(自身を含む): 42158016

約数和(自身を除く): 20752466

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 170, 425, 850, 25183, 50366, 125915, 251830, 428111, 629575, 856222, 1259150, 2140555, 4281110, 10702775, 21405550]

約数ペア:

[(1, 21405550), (2, 10702775), (5, 4281110), (10, 2140555), (17, 1259150), (25, 856222), (34, 629575), (50, 428111), (85, 251830), (170, 125915), (425, 50366), (850, 25183)]