81788990

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{2029}}^1$

素因数の和:2204

約数の個数: 32

約数和(自身を含む): 153468000

約数和(自身を除く): 71679010

約数列:

[1, 2, 5, 10, 29, 58, 139, 145, 278, 290, 695, 1390, 2029, 4031, 4058, 8062, 10145, 20155, 20290, 40310, 58841, 117682, 282031, 294205, 564062, 588410, 1410155, 2820310, 8178899, 16357798, 40894495, 81788990]

約数ペア:

[(1, 81788990), (2, 40894495), (5, 16357798), (10, 8178899), (29, 2820310), (58, 1410155), (139, 588410), (145, 564062), (278, 294205), (290, 282031), (695, 117682), (1390, 58841), (2029, 40310), (4031, 20290), (4058, 20155), (8062, 10145)]