18871587

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4219}}^1$

素因数の和:4303

約数の個数: 24

約数和(自身を含む): 31599360

約数和(自身を除く): 12727773

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4219, 4473, 12657, 29533, 37971, 88599, 265797, 299549, 898647, 2096843, 2695941, 6290529, 18871587]

約数ペア:

[(1, 18871587), (3, 6290529), (7, 2695941), (9, 2096843), (21, 898647), (63, 299549), (71, 265797), (213, 88599), (497, 37971), (639, 29533), (1491, 12657), (4219, 4473)]