18218529

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4073}}^1$

素因数の和:4157

約数の個数: 24

約数和(自身を含む): 30506112

約数和(自身を除く): 12287583

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4073, 4473, 12219, 28511, 36657, 85533, 256599, 289183, 867549, 2024281, 2602647, 6072843, 18218529]

約数ペア:

[(1, 18218529), (3, 6072843), (7, 2602647), (9, 2024281), (21, 867549), (63, 289183), (71, 256599), (213, 85533), (497, 36657), (639, 28511), (1491, 12219), (4073, 4473)]