21981296

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{3359}}^1$

素因数の和:3776

約数の個数: 20

約数和(自身を含む): 42705600

約数和(自身を除く): 20724304

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3272, 3359, 6544, 6718, 13436, 26872, 53744, 1373831, 2747662, 5495324, 10990648, 21981296]

約数ペア:

[(1, 21981296), (2, 10990648), (4, 5495324), (8, 2747662), (16, 1373831), (409, 53744), (818, 26872), (1636, 13436), (3272, 6718), (3359, 6544)]