19660355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{887}}^1$

素因数の和:947

約数の個数: 32

約数和(自身を含む): 28643328

約数和(自身を除く): 8982973

約数列:

[1, 5, 11, 13, 31, 55, 65, 143, 155, 341, 403, 715, 887, 1705, 2015, 4433, 4435, 9757, 11531, 22165, 27497, 48785, 57655, 126841, 137485, 302467, 357461, 634205, 1512335, 1787305, 3932071, 19660355]

約数ペア:

[(1, 19660355), (5, 3932071), (11, 1787305), (13, 1512335), (31, 634205), (55, 357461), (65, 302467), (143, 137485), (155, 126841), (341, 57655), (403, 48785), (715, 27497), (887, 22165), (1705, 11531), (2015, 9757), (4433, 4435)]