21356320

素因数分解:

$2^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1051}}^1$

素因数の和:1193

約数の個数: 48

約数和(自身を含む): 50899968

約数和(自身を除く): 29543648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1016, 1051, 1270, 2032, 2102, 2540, 4064, 4204, 5080, 5255, 8408, 10160, 10510, 16816, 20320, 21020, 33632, 42040, 84080, 133477, 168160, 266954, 533908, 667385, 1067816, 1334770, 2135632, 2669540, 4271264, 5339080, 10678160, 21356320]

約数ペア:

[(1, 21356320), (2, 10678160), (4, 5339080), (5, 4271264), (8, 2669540), (10, 2135632), (16, 1334770), (20, 1067816), (32, 667385), (40, 533908), (80, 266954), (127, 168160), (160, 133477), (254, 84080), (508, 42040), (635, 33632), (1016, 21020), (1051, 20320), (1270, 16816), (2032, 10510), (2102, 10160), (2540, 8408), (4064, 5255), (4204, 5080)]