21321490

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{631}}^1$

素因数の和:778

約数の個数: 32

約数和(自身を含む): 40043520

約数和(自身を除く): 18722030

約数列:

[1, 2, 5, 10, 31, 62, 109, 155, 218, 310, 545, 631, 1090, 1262, 3155, 3379, 6310, 6758, 16895, 19561, 33790, 39122, 68779, 97805, 137558, 195610, 343895, 687790, 2132149, 4264298, 10660745, 21321490]

約数ペア:

[(1, 21321490), (2, 10660745), (5, 4264298), (10, 2132149), (31, 687790), (62, 343895), (109, 195610), (155, 137558), (218, 97805), (310, 68779), (545, 39122), (631, 33790), (1090, 19561), (1262, 16895), (3155, 6758), (3379, 6310)]