20471984

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{113}}^1$

素因数の和:214

約数の個数: 60

約数和(自身を含む): 43977096

約数和(自身を除く): 23505112

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 113, 134, 169, 208, 226, 268, 338, 452, 536, 676, 871, 904, 1072, 1352, 1469, 1742, 1808, 2704, 2938, 3484, 5876, 6968, 7571, 11323, 11752, 13936, 15142, 19097, 22646, 23504, 30284, 38194, 45292, 60568, 76388, 90584, 98423, 121136, 152776, 181168, 196846, 305552, 393692, 787384, 1279499, 1574768, 2558998, 5117996, 10235992, 20471984]

約数ペア:

[(1, 20471984), (2, 10235992), (4, 5117996), (8, 2558998), (13, 1574768), (16, 1279499), (26, 787384), (52, 393692), (67, 305552), (104, 196846), (113, 181168), (134, 152776), (169, 121136), (208, 98423), (226, 90584), (268, 76388), (338, 60568), (452, 45292), (536, 38194), (676, 30284), (871, 23504), (904, 22646), (1072, 19097), (1352, 15142), (1469, 13936), (1742, 11752), (1808, 11323), (2704, 7571), (2938, 6968), (3484, 5876)]