21012920

素因数分解:

$2^3\times 5^1\times {\mathrm{599}}^1\times {\mathrm{877}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 47412000

約数和(自身を除く): 26399080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 599, 877, 1198, 1754, 2396, 2995, 3508, 4385, 4792, 5990, 7016, 8770, 11980, 17540, 23960, 35080, 525323, 1050646, 2101292, 2626615, 4202584, 5253230, 10506460, 21012920]

約数ペア:

[(1, 21012920), (2, 10506460), (4, 5253230), (5, 4202584), (8, 2626615), (10, 2101292), (20, 1050646), (40, 525323), (599, 35080), (877, 23960), (1198, 17540), (1754, 11980), (2396, 8770), (2995, 7016), (3508, 5990), (4385, 4792)]