220778890

素因数分解:

$2^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{78569}}^1$

素因数の和:78857

約数の個数: 16

約数和(自身を含む): 398821320

約数和(自身を除く): 178042430

約数列:

[1, 2, 5, 10, 281, 562, 1405, 2810, 78569, 157138, 392845, 785690, 22077889, 44155778, 110389445, 220778890]

約数ペア:

[(1, 220778890), (2, 110389445), (5, 44155778), (10, 22077889), (281, 785690), (562, 392845), (1405, 157138), (2810, 78569)]