20197980725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{25253}}^1$

素因数の和:25406

約数の個数: 48

約数和(自身を含む): 28408931712

約数和(自身を除く): 8210950987

約数列:

[1, 5, 13, 23, 25, 65, 107, 115, 299, 325, 535, 575, 1391, 1495, 2461, 2675, 6955, 7475, 12305, 25253, 31993, 34775, 61525, 126265, 159965, 328289, 580819, 631325, 799825, 1641445, 2702071, 2904095, 7550647, 8207225, 13510355, 14520475, 35126923, 37753235, 62147633, 67551775, 175634615, 188766175, 310738165, 807919229, 878173075, 1553690825, 4039596145, 20197980725]

約数ペア:

[(1, 20197980725), (5, 4039596145), (13, 1553690825), (23, 878173075), (25, 807919229), (65, 310738165), (107, 188766175), (115, 175634615), (299, 67551775), (325, 62147633), (535, 37753235), (575, 35126923), (1391, 14520475), (1495, 13510355), (2461, 8207225), (2675, 7550647), (6955, 2904095), (7475, 2702071), (12305, 1641445), (25253, 799825), (31993, 631325), (34775, 580819), (61525, 328289), (126265, 159965)]