21123095

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{271}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 31021056

約数和(自身を除く): 9897961

約数列:

[1, 5, 7, 17, 35, 85, 119, 131, 271, 595, 655, 917, 1355, 1897, 2227, 4585, 4607, 9485, 11135, 15589, 23035, 32249, 35501, 77945, 161245, 177505, 248507, 603517, 1242535, 3017585, 4224619, 21123095]

約数ペア:

[(1, 21123095), (5, 4224619), (7, 3017585), (17, 1242535), (35, 603517), (85, 248507), (119, 177505), (131, 161245), (271, 77945), (595, 35501), (655, 32249), (917, 23035), (1355, 15589), (1897, 11135), (2227, 9485), (4585, 4607)]