21426928

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:505

約数の個数: 40

約数和(自身を含む): 43122240

約数和(自身を除く): 21695312

約数列:

[1, 2, 4, 8, 16, 41, 82, 89, 164, 178, 328, 356, 367, 656, 712, 734, 1424, 1468, 2936, 3649, 5872, 7298, 14596, 15047, 29192, 30094, 32663, 58384, 60188, 65326, 120376, 130652, 240752, 261304, 522608, 1339183, 2678366, 5356732, 10713464, 21426928]

約数ペア:

[(1, 21426928), (2, 10713464), (4, 5356732), (8, 2678366), (16, 1339183), (41, 522608), (82, 261304), (89, 240752), (164, 130652), (178, 120376), (328, 65326), (356, 60188), (367, 58384), (656, 32663), (712, 30094), (734, 29192), (1424, 15047), (1468, 14596), (2936, 7298), (3649, 5872)]