21781331

素因数分解:

${\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:323

約数の個数: 24

約数和(自身を含む): 26321232

約数和(自身を除く): 4539901

約数列:

[1, 11, 13, 61, 121, 143, 227, 671, 793, 1573, 2497, 2951, 7381, 8723, 13847, 27467, 32461, 95953, 152317, 180011, 357071, 1675487, 1980121, 21781331]

約数ペア:

[(1, 21781331), (11, 1980121), (13, 1675487), (61, 357071), (121, 180011), (143, 152317), (227, 95953), (671, 32461), (793, 27467), (1573, 13847), (2497, 8723), (2951, 7381)]