21489290

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{74101}}^1$

素因数の和:74137

約数の個数: 16

約数和(自身を含む): 40015080

約数和(自身を除く): 18525790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 74101, 148202, 370505, 741010, 2148929, 4297858, 10744645, 21489290]

約数ペア:

[(1, 21489290), (2, 10744645), (5, 4297858), (10, 2148929), (29, 741010), (58, 370505), (145, 148202), (290, 74101)]