221405863

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{191}}^1\times {\mathrm{577}}^1$

素因数の和:823

約数の個数: 24

約数和(自身を含む): 265676544

約数和(自身を除く): 44270681

約数列:

[1, 7, 41, 49, 191, 287, 577, 1337, 2009, 4039, 7831, 9359, 23657, 28273, 54817, 110207, 165599, 383719, 771449, 1159193, 4518487, 5400143, 31629409, 221405863]

約数ペア:

[(1, 221405863), (7, 31629409), (41, 5400143), (49, 4518487), (191, 1159193), (287, 771449), (577, 383719), (1337, 165599), (2009, 110207), (4039, 54817), (7831, 28273), (9359, 23657)]