21861255

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1579}}^1$

素因数の和:1671

約数の個数: 32

約数和(自身を含む): 38223360

約数和(自身を除く): 16362105

約数列:

[1, 3, 5, 13, 15, 39, 65, 71, 195, 213, 355, 923, 1065, 1579, 2769, 4615, 4737, 7895, 13845, 20527, 23685, 61581, 102635, 112109, 307905, 336327, 560545, 1457417, 1681635, 4372251, 7287085, 21861255]

約数ペア:

[(1, 21861255), (3, 7287085), (5, 4372251), (13, 1681635), (15, 1457417), (39, 560545), (65, 336327), (71, 307905), (195, 112109), (213, 102635), (355, 61581), (923, 23685), (1065, 20527), (1579, 13845), (2769, 7895), (4615, 4737)]