20947025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{211}}^1$

素因数の和:270

約数の個数: 36

約数和(自身を含む): 30047184

約数和(自身を除く): 9100159

約数列:

[1, 5, 11, 19, 25, 55, 95, 209, 211, 275, 361, 475, 1045, 1055, 1805, 2321, 3971, 4009, 5225, 5275, 9025, 11605, 19855, 20045, 44099, 58025, 76171, 99275, 100225, 220495, 380855, 837881, 1102475, 1904275, 4189405, 20947025]

約数ペア:

[(1, 20947025), (5, 4189405), (11, 1904275), (19, 1102475), (25, 837881), (55, 380855), (95, 220495), (209, 100225), (211, 99275), (275, 76171), (361, 58025), (475, 44099), (1045, 20045), (1055, 19855), (1805, 11605), (2321, 9025), (3971, 5275), (4009, 5225)]