20975990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{10333}}^1$

素因数の和:10376

約数の個数: 32

約数和(自身を含む): 44642880

約数和(自身を除く): 23666890

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 406, 1015, 2030, 10333, 20666, 51665, 72331, 103330, 144662, 299657, 361655, 599314, 723310, 1498285, 2097599, 2996570, 4195198, 10487995, 20975990]

約数ペア:

[(1, 20975990), (2, 10487995), (5, 4195198), (7, 2996570), (10, 2097599), (14, 1498285), (29, 723310), (35, 599314), (58, 361655), (70, 299657), (145, 144662), (203, 103330), (290, 72331), (406, 51665), (1015, 20666), (2030, 10333)]