21780668

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1129}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 47839680

約数和(自身を除く): 26059012

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 53, 91, 106, 182, 212, 364, 371, 689, 742, 1129, 1378, 1484, 2258, 2756, 4516, 4823, 7903, 9646, 14677, 15806, 19292, 29354, 31612, 58708, 59837, 102739, 119674, 205478, 239348, 410956, 418859, 777881, 837718, 1555762, 1675436, 3111524, 5445167, 10890334, 21780668]

約数ペア:

[(1, 21780668), (2, 10890334), (4, 5445167), (7, 3111524), (13, 1675436), (14, 1555762), (26, 837718), (28, 777881), (52, 418859), (53, 410956), (91, 239348), (106, 205478), (182, 119674), (212, 102739), (364, 59837), (371, 58708), (689, 31612), (742, 29354), (1129, 19292), (1378, 15806), (1484, 14677), (2258, 9646), (2756, 7903), (4516, 4823)]