21917885

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 29922048

約数和(自身を除く): 8004163

約数列:

[1, 5, 11, 53, 55, 73, 103, 265, 365, 515, 583, 803, 1133, 2915, 3869, 4015, 5459, 5665, 7519, 19345, 27295, 37595, 42559, 60049, 82709, 212795, 300245, 398507, 413545, 1992535, 4383577, 21917885]

約数ペア:

[(1, 21917885), (5, 4383577), (11, 1992535), (53, 413545), (55, 398507), (73, 300245), (103, 212795), (265, 82709), (365, 60049), (515, 42559), (583, 37595), (803, 27295), (1133, 19345), (2915, 7519), (3869, 5665), (4015, 5459)]