21392570

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{52177}}^1$

素因数の和:52225

約数の個数: 16

約数和(自身を含む): 39446568

約数和(自身を除く): 18053998

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 52177, 104354, 260885, 521770, 2139257, 4278514, 10696285, 21392570]

約数ペア:

[(1, 21392570), (2, 10696285), (5, 4278514), (10, 2139257), (41, 521770), (82, 260885), (205, 104354), (410, 52177)]