20348965

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6389}}^1$

素因数の和:6421

約数の個数: 24

約数和(自身を含む): 30595320

約数和(自身を除く): 10246355

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6389, 31945, 44723, 83057, 223615, 313061, 415285, 581399, 1565305, 2906995, 4069793, 20348965]

約数ペア:

[(1, 20348965), (5, 4069793), (7, 2906995), (13, 1565305), (35, 581399), (49, 415285), (65, 313061), (91, 223615), (245, 83057), (455, 44723), (637, 31945), (3185, 6389)]