21131552

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{643}}^1$

素因数の和:745

約数の個数: 48

約数和(自身を含む): 45440640

約数和(自身を除く): 24309088

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 79, 104, 158, 208, 316, 416, 632, 643, 1027, 1264, 1286, 2054, 2528, 2572, 4108, 5144, 8216, 8359, 10288, 16432, 16718, 20576, 32864, 33436, 50797, 66872, 101594, 133744, 203188, 267488, 406376, 660361, 812752, 1320722, 1625504, 2641444, 5282888, 10565776, 21131552]

約数ペア:

[(1, 21131552), (2, 10565776), (4, 5282888), (8, 2641444), (13, 1625504), (16, 1320722), (26, 812752), (32, 660361), (52, 406376), (79, 267488), (104, 203188), (158, 133744), (208, 101594), (316, 66872), (416, 50797), (632, 33436), (643, 32864), (1027, 20576), (1264, 16718), (1286, 16432), (2054, 10288), (2528, 8359), (2572, 8216), (4108, 5144)]