21855717

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{877}}^1$

素因数の和:970

約数の個数: 32

約数和(自身を含む): 35400960

約数和(自身を除く): 13545243

約数列:

[1, 3, 9, 13, 27, 39, 71, 117, 213, 351, 639, 877, 923, 1917, 2631, 2769, 7893, 8307, 11401, 23679, 24921, 34203, 62267, 102609, 186801, 307827, 560403, 809471, 1681209, 2428413, 7285239, 21855717]

約数ペア:

[(1, 21855717), (3, 7285239), (9, 2428413), (13, 1681209), (27, 809471), (39, 560403), (71, 307827), (117, 186801), (213, 102609), (351, 62267), (639, 34203), (877, 24921), (923, 23679), (1917, 11401), (2631, 8307), (2769, 7893)]