21391728

素因数分解:

$2^4\times 3^1\times {\mathrm{137}}^1\times {\mathrm{3253}}^1$

素因数の和:3401

約数の個数: 40

約数和(自身を含む): 55682448

約数和(自身を除く): 34290720

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 137, 274, 411, 548, 822, 1096, 1644, 2192, 3253, 3288, 6506, 6576, 9759, 13012, 19518, 26024, 39036, 52048, 78072, 156144, 445661, 891322, 1336983, 1782644, 2673966, 3565288, 5347932, 7130576, 10695864, 21391728]

約数ペア:

[(1, 21391728), (2, 10695864), (3, 7130576), (4, 5347932), (6, 3565288), (8, 2673966), (12, 1782644), (16, 1336983), (24, 891322), (48, 445661), (137, 156144), (274, 78072), (411, 52048), (548, 39036), (822, 26024), (1096, 19518), (1644, 13012), (2192, 9759), (3253, 6576), (3288, 6506)]