21758480

素因数分解:

$2^4\times 5^1\times {\mathrm{271981}}^1$

素因数の和:271994

約数の個数: 20

約数和(自身を含む): 50588652

約数和(自身を除く): 28830172

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271981, 543962, 1087924, 1359905, 2175848, 2719810, 4351696, 5439620, 10879240, 21758480]

約数ペア:

[(1, 21758480), (2, 10879240), (4, 5439620), (5, 4351696), (8, 2719810), (10, 2175848), (16, 1359905), (20, 1087924), (40, 543962), (80, 271981)]