21373686

素因数分解:

$2^1\times 3^3\times {\mathrm{397}}^1\times {\mathrm{997}}^1$

素因数の和:1405

約数の個数: 32

約数和(自身を含む): 47664480

約数和(自身を除く): 26290794

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 397, 794, 997, 1191, 1994, 2382, 2991, 3573, 5982, 7146, 8973, 10719, 17946, 21438, 26919, 53838, 395809, 791618, 1187427, 2374854, 3562281, 7124562, 10686843, 21373686]

約数ペア:

[(1, 21373686), (2, 10686843), (3, 7124562), (6, 3562281), (9, 2374854), (18, 1187427), (27, 791618), (54, 395809), (397, 53838), (794, 26919), (997, 21438), (1191, 17946), (1994, 10719), (2382, 8973), (2991, 7146), (3573, 5982)]