19557680

素因数分解:

$2^4\times 5^1\times {\mathrm{244471}}^1$

素因数の和:244484

約数の個数: 20

約数和(自身を含む): 45471792

約数和(自身を除く): 25914112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 244471, 488942, 977884, 1222355, 1955768, 2444710, 3911536, 4889420, 9778840, 19557680]

約数ペア:

[(1, 19557680), (2, 9778840), (4, 4889420), (5, 3911536), (8, 2444710), (10, 1955768), (16, 1222355), (20, 977884), (40, 488942), (80, 244471)]