21275397

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{271}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 36830976

約数和(自身を除く): 15555579

約数列:

[1, 3, 9, 11, 13, 33, 39, 61, 99, 117, 143, 183, 271, 429, 549, 671, 793, 813, 1287, 2013, 2379, 2439, 2981, 3523, 6039, 7137, 8723, 8943, 10569, 16531, 26169, 26829, 31707, 38753, 49593, 78507, 116259, 148779, 181841, 214903, 348777, 545523, 644709, 1636569, 1934127, 2363933, 7091799, 21275397]

約数ペア:

[(1, 21275397), (3, 7091799), (9, 2363933), (11, 1934127), (13, 1636569), (33, 644709), (39, 545523), (61, 348777), (99, 214903), (117, 181841), (143, 148779), (183, 116259), (271, 78507), (429, 49593), (549, 38753), (671, 31707), (793, 26829), (813, 26169), (1287, 16531), (2013, 10569), (2379, 8943), (2439, 8723), (2981, 7137), (3523, 6039)]