21072025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{2819}}^1$

素因数の和:2865

約数の個数: 24

約数和(自身を含む): 29373120

約数和(自身を除く): 8301095

約数列:

[1, 5, 13, 23, 25, 65, 115, 299, 325, 575, 1495, 2819, 7475, 14095, 36647, 64837, 70475, 183235, 324185, 842881, 916175, 1620925, 4214405, 21072025]

約数ペア:

[(1, 21072025), (5, 4214405), (13, 1620925), (23, 916175), (25, 842881), (65, 324185), (115, 183235), (299, 70475), (325, 64837), (575, 36647), (1495, 14095), (2819, 7475)]