21207615

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{9887}}^1$

素因数の和:9919

約数の個数: 32

約数和(自身を含む): 39868416

約数和(自身を除く): 18660801

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 65, 143, 165, 195, 429, 715, 2145, 9887, 29661, 49435, 108757, 128531, 148305, 326271, 385593, 543785, 642655, 1413841, 1631355, 1927965, 4241523, 7069205, 21207615]

約数ペア:

[(1, 21207615), (3, 7069205), (5, 4241523), (11, 1927965), (13, 1631355), (15, 1413841), (33, 642655), (39, 543785), (55, 385593), (65, 326271), (143, 148305), (165, 128531), (195, 108757), (429, 49435), (715, 29661), (2145, 9887)]