21215978

素因数分解:

$2^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{13903}}^1$

素因数の和:14021

約数の個数: 16

約数和(自身を含む): 36706560

約数和(自身を除く): 15490582

約数列:

[1, 2, 7, 14, 109, 218, 763, 1526, 13903, 27806, 97321, 194642, 1515427, 3030854, 10607989, 21215978]

約数ペア:

[(1, 21215978), (2, 10607989), (7, 3030854), (14, 1515427), (109, 194642), (218, 97321), (763, 27806), (1526, 13903)]