21056895

素因数分解:

$3^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2557}}^1$

素因数の和:2632

約数の個数: 32

約数和(自身を含む): 38063040

約数和(自身を除く): 17006145

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 135, 183, 305, 549, 915, 1647, 2557, 2745, 7671, 8235, 12785, 23013, 38355, 69039, 115065, 155977, 345195, 467931, 779885, 1403793, 2339655, 4211379, 7018965, 21056895]

約数ペア:

[(1, 21056895), (3, 7018965), (5, 4211379), (9, 2339655), (15, 1403793), (27, 779885), (45, 467931), (61, 345195), (135, 155977), (183, 115065), (305, 69039), (549, 38355), (915, 23013), (1647, 12785), (2557, 8235), (2745, 7671)]