21475675

素因数分解:

$5^2\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:89

約数の個数: 48

約数和(自身を含む): 31872960

約数和(自身を除く): 10397285

約数列:

[1, 5, 13, 17, 23, 25, 65, 85, 115, 169, 221, 299, 325, 391, 425, 575, 845, 1105, 1495, 1955, 2197, 2873, 3887, 4225, 5083, 5525, 7475, 9775, 10985, 14365, 19435, 25415, 37349, 50531, 54925, 66079, 71825, 97175, 127075, 186745, 252655, 330395, 859027, 933725, 1263275, 1651975, 4295135, 21475675]

約数ペア:

[(1, 21475675), (5, 4295135), (13, 1651975), (17, 1263275), (23, 933725), (25, 859027), (65, 330395), (85, 252655), (115, 186745), (169, 127075), (221, 97175), (299, 71825), (325, 66079), (391, 54925), (425, 50531), (575, 37349), (845, 25415), (1105, 19435), (1495, 14365), (1955, 10985), (2197, 9775), (2873, 7475), (3887, 5525), (4225, 5083)]