19645821

素因数分解:

$3^7\times {\mathrm{13}}^1\times {\mathrm{691}}^1$

素因数の和:725

約数の個数: 32

約数和(自身を含む): 31776640

約数和(自身を除く): 12130819

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 691, 729, 1053, 2073, 2187, 3159, 6219, 8983, 9477, 18657, 26949, 28431, 55971, 80847, 167913, 242541, 503739, 727623, 1511217, 2182869, 6548607, 19645821]

約数ペア:

[(1, 19645821), (3, 6548607), (9, 2182869), (13, 1511217), (27, 727623), (39, 503739), (81, 242541), (117, 167913), (243, 80847), (351, 55971), (691, 28431), (729, 26949), (1053, 18657), (2073, 9477), (2187, 8983), (3159, 6219)]