21115309

素因数分解:

${\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{389}}^1$

素因数の和:540

約数の個数: 16

約数和(自身を含む): 23362560

約数和(自身を除く): 2247251

約数列:

[1, 17, 31, 103, 389, 527, 1751, 3193, 6613, 12059, 40067, 54281, 205003, 681139, 1242077, 21115309]

約数ペア:

[(1, 21115309), (17, 1242077), (31, 681139), (103, 205003), (389, 54281), (527, 40067), (1751, 12059), (3193, 6613)]