21781406

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{4447}}^1$

素因数の和:4559

約数の個数: 16

約数和(自身を含む): 34160640

約数和(自身を除く): 12379234

約数列:

[1, 2, 31, 62, 79, 158, 2449, 4447, 4898, 8894, 137857, 275714, 351313, 702626, 10890703, 21781406]

約数ペア:

[(1, 21781406), (2, 10890703), (31, 702626), (62, 351313), (79, 275714), (158, 137857), (2449, 8894), (4447, 4898)]