21408990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{5209}}^1$

素因数の和:5356

約数の個数: 32

約数和(自身を含む): 51766560

約数和(自身を除く): 30357570

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 137, 274, 411, 685, 822, 1370, 2055, 4110, 5209, 10418, 15627, 26045, 31254, 52090, 78135, 156270, 713633, 1427266, 2140899, 3568165, 4281798, 7136330, 10704495, 21408990]

約数ペア:

[(1, 21408990), (2, 10704495), (3, 7136330), (5, 4281798), (6, 3568165), (10, 2140899), (15, 1427266), (30, 713633), (137, 156270), (274, 78135), (411, 52090), (685, 31254), (822, 26045), (1370, 15627), (2055, 10418), (4110, 5209)]