21239406

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{31891}}^1$

素因数の和:31936

約数の個数: 24

約数和(自身を含む): 47263944

約数和(自身を除く): 26024538

約数列:

[1, 2, 3, 6, 9, 18, 37, 74, 111, 222, 333, 666, 31891, 63782, 95673, 191346, 287019, 574038, 1179967, 2359934, 3539901, 7079802, 10619703, 21239406]

約数ペア:

[(1, 21239406), (2, 10619703), (3, 7079802), (6, 3539901), (9, 2359934), (18, 1179967), (37, 574038), (74, 287019), (111, 191346), (222, 95673), (333, 63782), (666, 31891)]