21430825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 30998016

約数和(自身を除く): 9567191

約数列:

[1, 5, 13, 23, 25, 47, 61, 65, 115, 235, 299, 305, 325, 575, 611, 793, 1081, 1175, 1403, 1495, 1525, 2867, 3055, 3965, 5405, 7015, 7475, 14053, 14335, 15275, 18239, 19825, 27025, 35075, 37271, 65941, 70265, 71675, 91195, 186355, 329705, 351325, 455975, 857233, 931775, 1648525, 4286165, 21430825]

約数ペア:

[(1, 21430825), (5, 4286165), (13, 1648525), (23, 931775), (25, 857233), (47, 455975), (61, 351325), (65, 329705), (115, 186355), (235, 91195), (299, 71675), (305, 70265), (325, 65941), (575, 37271), (611, 35075), (793, 27025), (1081, 19825), (1175, 18239), (1403, 15275), (1495, 14335), (1525, 14053), (2867, 7475), (3055, 7015), (3965, 5405)]