21051992

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{677}}^1$

素因数の和:732

約数の個数: 48

約数和(自身を含む): 44666640

約数和(自身を除く): 23614648

約数列:

[1, 2, 4, 8, 13, 23, 26, 46, 52, 92, 104, 169, 184, 299, 338, 598, 676, 677, 1196, 1352, 1354, 2392, 2708, 3887, 5416, 7774, 8801, 15548, 15571, 17602, 31096, 31142, 35204, 62284, 70408, 114413, 124568, 202423, 228826, 404846, 457652, 809692, 915304, 1619384, 2631499, 5262998, 10525996, 21051992]

約数ペア:

[(1, 21051992), (2, 10525996), (4, 5262998), (8, 2631499), (13, 1619384), (23, 915304), (26, 809692), (46, 457652), (52, 404846), (92, 228826), (104, 202423), (169, 124568), (184, 114413), (299, 70408), (338, 62284), (598, 35204), (676, 31142), (677, 31096), (1196, 17602), (1352, 15571), (1354, 15548), (2392, 8801), (2708, 7774), (3887, 5416)]