9801980

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1907}}^1$

素因数の和:2173

約数の個数: 24

約数和(自身を含む): 20675088

約数和(自身を除く): 10873108

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 1907, 2570, 3814, 5140, 7628, 9535, 19070, 38140, 490099, 980198, 1960396, 2450495, 4900990, 9801980]

約数ペア:

[(1, 9801980), (2, 4900990), (4, 2450495), (5, 1960396), (10, 980198), (20, 490099), (257, 38140), (514, 19070), (1028, 9535), (1285, 7628), (1907, 5140), (2570, 3814)]