168020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1$

素因数の和:311

約数の個数: 24

約数和(自身を含む): 365568

約数和(自身を除く): 197548

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 271, 310, 542, 620, 1084, 1355, 2710, 5420, 8401, 16802, 33604, 42005, 84010, 168020]

約数ペア:

[(1, 168020), (2, 84010), (4, 42005), (5, 33604), (10, 16802), (20, 8401), (31, 5420), (62, 2710), (124, 1355), (155, 1084), (271, 620), (310, 542)]