20129840

素因数分解:

$2^4\times 5^1\times {\mathrm{251623}}^1$

素因数の和:251636

約数の個数: 20

約数和(自身を含む): 46802064

約数和(自身を除く): 26672224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251623, 503246, 1006492, 1258115, 2012984, 2516230, 4025968, 5032460, 10064920, 20129840]

約数ペア:

[(1, 20129840), (2, 10064920), (4, 5032460), (5, 4025968), (8, 2516230), (10, 2012984), (16, 1258115), (20, 1006492), (40, 503246), (80, 251623)]