21197980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62347}}^1$

素因数の和:62373

約数の個数: 24

約数和(自身を含む): 47135088

約数和(自身を除く): 25937108

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62347, 124694, 249388, 311735, 623470, 1059899, 1246940, 2119798, 4239596, 5299495, 10598990, 21197980]

約数ペア:

[(1, 21197980), (2, 10598990), (4, 5299495), (5, 4239596), (10, 2119798), (17, 1246940), (20, 1059899), (34, 623470), (68, 311735), (85, 249388), (170, 124694), (340, 62347)]