21253778

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^3\times {\mathrm{691}}^1$

素因数の和:739

約数の個数: 32

約数和(自身を含む): 39527040

約数和(自身を除く): 18273262

約数列:

[1, 2, 7, 13, 14, 26, 91, 169, 182, 338, 691, 1183, 1382, 2197, 2366, 4394, 4837, 8983, 9674, 15379, 17966, 30758, 62881, 116779, 125762, 233558, 817453, 1518127, 1634906, 3036254, 10626889, 21253778]

約数ペア:

[(1, 21253778), (2, 10626889), (7, 3036254), (13, 1634906), (14, 1518127), (26, 817453), (91, 233558), (169, 125762), (182, 116779), (338, 62881), (691, 30758), (1183, 17966), (1382, 15379), (2197, 9674), (2366, 8983), (4394, 4837)]