21050575

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{487}}^1$

素因数の和:536

約数の個数: 48

約数和(自身を含む): 33886720

約数和(自身を除く): 12836145

約数列:

[1, 5, 7, 13, 19, 25, 35, 65, 91, 95, 133, 175, 247, 325, 455, 475, 487, 665, 1235, 1729, 2275, 2435, 3325, 3409, 6175, 6331, 8645, 9253, 12175, 17045, 31655, 43225, 44317, 46265, 64771, 85225, 120289, 158275, 221585, 231325, 323855, 601445, 842023, 1107925, 1619275, 3007225, 4210115, 21050575]

約数ペア:

[(1, 21050575), (5, 4210115), (7, 3007225), (13, 1619275), (19, 1107925), (25, 842023), (35, 601445), (65, 323855), (91, 231325), (95, 221585), (133, 158275), (175, 120289), (247, 85225), (325, 64771), (455, 46265), (475, 44317), (487, 43225), (665, 31655), (1235, 17045), (1729, 12175), (2275, 9253), (2435, 8645), (3325, 6331), (3409, 6175)]