20889505

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1481}}^1$

素因数の和:1537

約数の個数: 32

約数和(自身を含む): 31868928

約数和(自身を除く): 10979423

約数列:

[1, 5, 7, 13, 31, 35, 65, 91, 155, 217, 403, 455, 1085, 1481, 2015, 2821, 7405, 10367, 14105, 19253, 45911, 51835, 96265, 134771, 229555, 321377, 596843, 673855, 1606885, 2984215, 4177901, 20889505]

約数ペア:

[(1, 20889505), (5, 4177901), (7, 2984215), (13, 1606885), (31, 673855), (35, 596843), (65, 321377), (91, 229555), (155, 134771), (217, 96265), (403, 51835), (455, 45911), (1085, 19253), (1481, 14105), (2015, 10367), (2821, 7405)]