21379240

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{9059}}^1$

素因数の和:9129

約数の個数: 32

約数和(自身を含む): 48924000

約数和(自身を除く): 27544760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 118, 236, 295, 472, 590, 1180, 2360, 9059, 18118, 36236, 45295, 72472, 90590, 181180, 362360, 534481, 1068962, 2137924, 2672405, 4275848, 5344810, 10689620, 21379240]

約数ペア:

[(1, 21379240), (2, 10689620), (4, 5344810), (5, 4275848), (8, 2672405), (10, 2137924), (20, 1068962), (40, 534481), (59, 362360), (118, 181180), (236, 90590), (295, 72472), (472, 45295), (590, 36236), (1180, 18118), (2360, 9059)]