21287762

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{2621}}^1$

素因数の和:2785

約数の個数: 16

約数和(自身を含む): 33225984

約数和(自身を除く): 11938222

約数列:

[1, 2, 31, 62, 131, 262, 2621, 4061, 5242, 8122, 81251, 162502, 343351, 686702, 10643881, 21287762]

約数ペア:

[(1, 21287762), (2, 10643881), (31, 686702), (62, 343351), (131, 162502), (262, 81251), (2621, 8122), (4061, 5242)]