21659157

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{307}}^1$

素因数の和:399

約数の個数: 40

約数和(自身を含む): 35479136

約数和(自身を除く): 13819979

約数列:

[1, 3, 9, 13, 27, 39, 67, 81, 117, 201, 307, 351, 603, 871, 921, 1053, 1809, 2613, 2763, 3991, 5427, 7839, 8289, 11973, 20569, 23517, 24867, 35919, 61707, 70551, 107757, 185121, 267397, 323271, 555363, 802191, 1666089, 2406573, 7219719, 21659157]

約数ペア:

[(1, 21659157), (3, 7219719), (9, 2406573), (13, 1666089), (27, 802191), (39, 555363), (67, 323271), (81, 267397), (117, 185121), (201, 107757), (307, 70551), (351, 61707), (603, 35919), (871, 24867), (921, 23517), (1053, 20569), (1809, 11973), (2613, 8289), (2763, 7839), (3991, 5427)]