19987684

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{359}}^1\times {\mathrm{449}}^1$

素因数の和:843

約数の個数: 24

約数和(自身を含む): 36288000

約数和(自身を除く): 16300316

約数列:

[1, 2, 4, 31, 62, 124, 359, 449, 718, 898, 1436, 1796, 11129, 13919, 22258, 27838, 44516, 55676, 161191, 322382, 644764, 4996921, 9993842, 19987684]

約数ペア:

[(1, 19987684), (2, 9993842), (4, 4996921), (31, 644764), (62, 322382), (124, 161191), (359, 55676), (449, 44516), (718, 27838), (898, 22258), (1436, 13919), (1796, 11129)]