21278538

素因数分解:

$2^1\times 3^5\times {\mathrm{43783}}^1$

素因数の和:43800

約数の個数: 24

約数和(自身を含む): 47812128

約数和(自身を除く): 26533590

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 243, 486, 43783, 87566, 131349, 262698, 394047, 788094, 1182141, 2364282, 3546423, 7092846, 10639269, 21278538]

約数ペア:

[(1, 21278538), (2, 10639269), (3, 7092846), (6, 3546423), (9, 2364282), (18, 1182141), (27, 788094), (54, 394047), (81, 262698), (162, 131349), (243, 87566), (486, 43783)]