639713086

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{997}}^1$

素因数の和:1240

約数の個数: 32

約数和(自身を含む): 1011732480

約数和(自身を除く): 372019394

約数列:

[1, 2, 31, 62, 79, 131, 158, 262, 997, 1994, 2449, 4061, 4898, 8122, 10349, 20698, 30907, 61814, 78763, 130607, 157526, 261214, 320819, 641638, 2441653, 4048817, 4883306, 8097634, 10317953, 20635906, 319856543, 639713086]

約数ペア:

[(1, 639713086), (2, 319856543), (31, 20635906), (62, 10317953), (79, 8097634), (131, 4883306), (158, 4048817), (262, 2441653), (997, 641638), (1994, 320819), (2449, 261214), (4061, 157526), (4898, 130607), (8122, 78763), (10349, 61814), (20698, 30907)]