16819985

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{5281}}^1$

素因数の和:5313

約数の個数: 24

約数和(自身を含む): 25290216

約数和(自身を除く): 8470231

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 5281, 26405, 36967, 68653, 184835, 258769, 343265, 480571, 1293845, 2402855, 3363997, 16819985]

約数ペア:

[(1, 16819985), (5, 3363997), (7, 2402855), (13, 1293845), (35, 480571), (49, 343265), (65, 258769), (91, 184835), (245, 68653), (455, 36967), (637, 26405), (3185, 5281)]