9781990

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{379}}^1$

素因数の和:504

約数の個数: 32

約数和(自身を含む): 18468000

約数和(自身を除く): 8686010

約数列:

[1, 2, 5, 10, 29, 58, 89, 145, 178, 290, 379, 445, 758, 890, 1895, 2581, 3790, 5162, 10991, 12905, 21982, 25810, 33731, 54955, 67462, 109910, 168655, 337310, 978199, 1956398, 4890995, 9781990]

約数ペア:

[(1, 9781990), (2, 4890995), (5, 1956398), (10, 978199), (29, 337310), (58, 168655), (89, 109910), (145, 67462), (178, 54955), (290, 33731), (379, 25810), (445, 21982), (758, 12905), (890, 10991), (1895, 5162), (2581, 3790)]