251352171

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{28703}}^1$

素因数の和:28855

約数の個数: 24

約数和(自身を含む): 417930240

約数和(自身を除く): 166578069

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2919, 8757, 28703, 86109, 200921, 258327, 602763, 1808289, 3989717, 11969151, 27928019, 35907453, 83784057, 251352171]

約数ペア:

[(1, 251352171), (3, 83784057), (7, 35907453), (9, 27928019), (21, 11969151), (63, 3989717), (139, 1808289), (417, 602763), (973, 258327), (1251, 200921), (2919, 86109), (8757, 28703)]