21510640

素因数分解:

$2^4\times 5^1\times {\mathrm{268883}}^1$

素因数の和:268896

約数の個数: 20

約数和(自身を含む): 50012424

約数和(自身を除く): 28501784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268883, 537766, 1075532, 1344415, 2151064, 2688830, 4302128, 5377660, 10755320, 21510640]

約数ペア:

[(1, 21510640), (2, 10755320), (4, 5377660), (5, 4302128), (8, 2688830), (10, 2151064), (16, 1344415), (20, 1075532), (40, 537766), (80, 268883)]