21065125

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{431}}^1$

素因数の和:486

約数の個数: 32

約数和(自身を含む): 29113344

約数和(自身を除く): 8048219

約数列:

[1, 5, 17, 23, 25, 85, 115, 125, 391, 425, 431, 575, 1955, 2125, 2155, 2875, 7327, 9775, 9913, 10775, 36635, 48875, 49565, 53875, 168521, 183175, 247825, 842605, 915875, 1239125, 4213025, 21065125]

約数ペア:

[(1, 21065125), (5, 4213025), (17, 1239125), (23, 915875), (25, 842605), (85, 247825), (115, 183175), (125, 168521), (391, 53875), (425, 49565), (431, 48875), (575, 36635), (1955, 10775), (2125, 9913), (2155, 9775), (2875, 7327)]