21204920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48193}}^1$

素因数の和:48215

約数の個数: 32

約数和(自身を含む): 52049520

約数和(自身を除く): 30844600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48193, 96386, 192772, 240965, 385544, 481930, 530123, 963860, 1060246, 1927720, 2120492, 2650615, 4240984, 5301230, 10602460, 21204920]

約数ペア:

[(1, 21204920), (2, 10602460), (4, 5301230), (5, 4240984), (8, 2650615), (10, 2120492), (11, 1927720), (20, 1060246), (22, 963860), (40, 530123), (44, 481930), (55, 385544), (88, 240965), (110, 192772), (220, 96386), (440, 48193)]