21120944

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:214

約数の個数: 60

約数和(自身を含む): 45338616

約数和(自身を除く): 24217672

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 107, 146, 169, 208, 214, 292, 338, 428, 584, 676, 856, 949, 1168, 1352, 1391, 1712, 1898, 2704, 2782, 3796, 5564, 7592, 7811, 11128, 12337, 15184, 15622, 18083, 22256, 24674, 31244, 36166, 49348, 62488, 72332, 98696, 101543, 124976, 144664, 197392, 203086, 289328, 406172, 812344, 1320059, 1624688, 2640118, 5280236, 10560472, 21120944]

約数ペア:

[(1, 21120944), (2, 10560472), (4, 5280236), (8, 2640118), (13, 1624688), (16, 1320059), (26, 812344), (52, 406172), (73, 289328), (104, 203086), (107, 197392), (146, 144664), (169, 124976), (208, 101543), (214, 98696), (292, 72332), (338, 62488), (428, 49348), (584, 36166), (676, 31244), (856, 24674), (949, 22256), (1168, 18083), (1352, 15622), (1391, 15184), (1712, 12337), (1898, 11128), (2704, 7811), (2782, 7592), (3796, 5564)]