21274460

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4139}}^1$

素因数の和:4405

約数の個数: 24

約数和(自身を含む): 44861040

約数和(自身を除く): 23586580

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4139, 5140, 8278, 16556, 20695, 41390, 82780, 1063723, 2127446, 4254892, 5318615, 10637230, 21274460]

約数ペア:

[(1, 21274460), (2, 10637230), (4, 5318615), (5, 4254892), (10, 2127446), (20, 1063723), (257, 82780), (514, 41390), (1028, 20695), (1285, 16556), (2570, 8278), (4139, 5140)]