21618840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{701}}^1$

素因数の和:972

約数の個数: 64

約数和(自身を含む): 65201760

約数和(自身を除く): 43582920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 257, 514, 701, 771, 1028, 1285, 1402, 1542, 2056, 2103, 2570, 2804, 3084, 3505, 3855, 4206, 5140, 5608, 6168, 7010, 7710, 8412, 10280, 10515, 14020, 15420, 16824, 21030, 28040, 30840, 42060, 84120, 180157, 360314, 540471, 720628, 900785, 1080942, 1441256, 1801570, 2161884, 2702355, 3603140, 4323768, 5404710, 7206280, 10809420, 21618840]

約数ペア:

[(1, 21618840), (2, 10809420), (3, 7206280), (4, 5404710), (5, 4323768), (6, 3603140), (8, 2702355), (10, 2161884), (12, 1801570), (15, 1441256), (20, 1080942), (24, 900785), (30, 720628), (40, 540471), (60, 360314), (120, 180157), (257, 84120), (514, 42060), (701, 30840), (771, 28040), (1028, 21030), (1285, 16824), (1402, 15420), (1542, 14020), (2056, 10515), (2103, 10280), (2570, 8412), (2804, 7710), (3084, 7010), (3505, 6168), (3855, 5608), (4206, 5140)]