20784725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2063}}^1$

素因数の和:2117

約数の個数: 24

約数和(自身を含む): 28664832

約数和(自身を除く): 7880107

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 2015, 2063, 10075, 10315, 26819, 51575, 63953, 134095, 319765, 670475, 831389, 1598825, 4156945, 20784725]

約数ペア:

[(1, 20784725), (5, 4156945), (13, 1598825), (25, 831389), (31, 670475), (65, 319765), (155, 134095), (325, 63953), (403, 51575), (775, 26819), (2015, 10315), (2063, 10075)]