179720020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{289871}}^1$

素因数の和:289911

約数の個数: 24

約数和(自身を含む): 389587968

約数和(自身を除く): 209867948

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 289871, 579742, 1159484, 1449355, 2898710, 5797420, 8986001, 17972002, 35944004, 44930005, 89860010, 179720020]

約数ペア:

[(1, 179720020), (2, 89860010), (4, 44930005), (5, 35944004), (10, 17972002), (20, 8986001), (31, 5797420), (62, 2898710), (124, 1449355), (155, 1159484), (310, 579742), (620, 289871)]