31128220

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^2\times {\mathrm{131}}^1$

素因数の和:358

約数の個数: 36

約数和(自身を含む): 66478104

約数和(自身を除く): 35349884

約数列:

[1, 2, 4, 5, 10, 20, 109, 131, 218, 262, 436, 524, 545, 655, 1090, 1310, 2180, 2620, 11881, 14279, 23762, 28558, 47524, 57116, 59405, 71395, 118810, 142790, 237620, 285580, 1556411, 3112822, 6225644, 7782055, 15564110, 31128220]

約数ペア:

[(1, 31128220), (2, 15564110), (4, 7782055), (5, 6225644), (10, 3112822), (20, 1556411), (109, 285580), (131, 237620), (218, 142790), (262, 118810), (436, 71395), (524, 59405), (545, 57116), (655, 47524), (1090, 28558), (1310, 23762), (2180, 14279), (2620, 11881)]