21692529

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1$

素因数の和:259

約数の個数: 40

約数和(自身を含む): 34290432

約数和(自身を除く): 12597903

約数列:

[1, 3, 9, 27, 31, 53, 81, 93, 159, 163, 279, 477, 489, 837, 1431, 1467, 1643, 2511, 4293, 4401, 4929, 5053, 8639, 13203, 14787, 15159, 25917, 44361, 45477, 77751, 133083, 136431, 233253, 267809, 409293, 699759, 803427, 2410281, 7230843, 21692529]

約数ペア:

[(1, 21692529), (3, 7230843), (9, 2410281), (27, 803427), (31, 699759), (53, 409293), (81, 267809), (93, 233253), (159, 136431), (163, 133083), (279, 77751), (477, 45477), (489, 44361), (837, 25917), (1431, 15159), (1467, 14787), (1643, 13203), (2511, 8639), (4293, 5053), (4401, 4929)]