21238160

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{5009}}^1$

素因数の和:5075

約数の個数: 40

約数和(自身を含む): 50320440

約数和(自身を除く): 29082280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 5009, 10018, 20036, 25045, 40072, 50090, 80144, 100180, 200360, 265477, 400720, 530954, 1061908, 1327385, 2123816, 2654770, 4247632, 5309540, 10619080, 21238160]

約数ペア:

[(1, 21238160), (2, 10619080), (4, 5309540), (5, 4247632), (8, 2654770), (10, 2123816), (16, 1327385), (20, 1061908), (40, 530954), (53, 400720), (80, 265477), (106, 200360), (212, 100180), (265, 80144), (424, 50090), (530, 40072), (848, 25045), (1060, 20036), (2120, 10018), (4240, 5009)]