81051980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{130729}}^1$

素因数の和:130769

約数の個数: 24

約数和(自身を含む): 175701120

約数和(自身を除く): 94649140

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 130729, 261458, 522916, 653645, 1307290, 2614580, 4052599, 8105198, 16210396, 20262995, 40525990, 81051980]

約数ペア:

[(1, 81051980), (2, 40525990), (4, 20262995), (5, 16210396), (10, 8105198), (20, 4052599), (31, 2614580), (62, 1307290), (124, 653645), (155, 522916), (310, 261458), (620, 130729)]