21206320

素因数分解:

$2^4\times 5^1\times {\mathrm{265079}}^1$

素因数の和:265092

約数の個数: 20

約数和(自身を含む): 49304880

約数和(自身を除く): 28098560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265079, 530158, 1060316, 1325395, 2120632, 2650790, 4241264, 5301580, 10603160, 21206320]

約数ペア:

[(1, 21206320), (2, 10603160), (4, 5301580), (5, 4241264), (8, 2650790), (10, 2120632), (16, 1325395), (20, 1060316), (40, 530158), (80, 265079)]