18538775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1259}}^1$

素因数の和:1319

約数の個数: 24

約数和(自身を含む): 24998400

約数和(自身を除く): 6459625

約数列:

[1, 5, 19, 25, 31, 95, 155, 475, 589, 775, 1259, 2945, 6295, 14725, 23921, 31475, 39029, 119605, 195145, 598025, 741551, 975725, 3707755, 18538775]

約数ペア:

[(1, 18538775), (5, 3707755), (19, 975725), (25, 741551), (31, 598025), (95, 195145), (155, 119605), (475, 39029), (589, 31475), (775, 23921), (1259, 14725), (2945, 6295)]