21821320

素因数分解:

$2^3\times 5^1\times {\mathrm{545533}}^1$

素因数の和:545544

約数の個数: 16

約数和(自身を含む): 49098060

約数和(自身を除く): 27276740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 545533, 1091066, 2182132, 2727665, 4364264, 5455330, 10910660, 21821320]

約数ペア:

[(1, 21821320), (2, 10910660), (4, 5455330), (5, 4364264), (8, 2727665), (10, 2182132), (20, 1091066), (40, 545533)]