28407920

素因数分解:

$2^4\times 5^1\times {\mathrm{355099}}^1$

素因数の和:355112

約数の個数: 20

約数和(自身を含む): 66048600

約数和(自身を除く): 37640680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 355099, 710198, 1420396, 1775495, 2840792, 3550990, 5681584, 7101980, 14203960, 28407920]

約数ペア:

[(1, 28407920), (2, 14203960), (4, 7101980), (5, 5681584), (8, 3550990), (10, 2840792), (16, 1775495), (20, 1420396), (40, 710198), (80, 355099)]