19851813

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{661}}^1$

素因数の和:785

約数の個数: 24

約数和(自身を含む): 29742336

約数和(自身を除く): 9890523

約数列:

[1, 3, 9, 47, 71, 141, 213, 423, 639, 661, 1983, 3337, 5949, 10011, 30033, 31067, 46931, 93201, 140793, 279603, 422379, 2205757, 6617271, 19851813]

約数ペア:

[(1, 19851813), (3, 6617271), (9, 2205757), (47, 422379), (71, 279603), (141, 140793), (213, 93201), (423, 46931), (639, 31067), (661, 30033), (1983, 10011), (3337, 5949)]