15880240

素因数分解:

$2^4\times 5^1\times {\mathrm{198503}}^1$

素因数の和:198516

約数の個数: 20

約数和(自身を含む): 36921744

約数和(自身を除く): 21041504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 198503, 397006, 794012, 992515, 1588024, 1985030, 3176048, 3970060, 7940120, 15880240]

約数ペア:

[(1, 15880240), (2, 7940120), (4, 3970060), (5, 3176048), (8, 1985030), (10, 1588024), (16, 992515), (20, 794012), (40, 397006), (80, 198503)]