21145215

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2213}}^1$

素因数の和:2248

約数の個数: 48

約数和(自身を含む): 42402528

約数和(自身を除く): 21257313

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 2213, 3185, 6639, 9555, 11065, 15491, 28769, 33195, 46473, 77455, 86307, 108437, 143845, 201383, 232365, 325311, 431535, 542185, 604149, 1006915, 1409681, 1626555, 3020745, 4229043, 7048405, 21145215]

約数ペア:

[(1, 21145215), (3, 7048405), (5, 4229043), (7, 3020745), (13, 1626555), (15, 1409681), (21, 1006915), (35, 604149), (39, 542185), (49, 431535), (65, 325311), (91, 232365), (105, 201383), (147, 143845), (195, 108437), (245, 86307), (273, 77455), (455, 46473), (637, 33195), (735, 28769), (1365, 15491), (1911, 11065), (2213, 9555), (3185, 6639)]