21380968

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{607}}^1$

素因数の和:674

約数の個数: 64

約数和(自身を含む): 49904640

約数和(自身を除く): 28523672

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 37, 56, 68, 74, 119, 136, 148, 238, 259, 296, 476, 518, 607, 629, 952, 1036, 1214, 1258, 2072, 2428, 2516, 4249, 4403, 4856, 5032, 8498, 8806, 10319, 16996, 17612, 20638, 22459, 33992, 35224, 41276, 44918, 72233, 82552, 89836, 144466, 157213, 179672, 288932, 314426, 381803, 577864, 628852, 763606, 1257704, 1527212, 2672621, 3054424, 5345242, 10690484, 21380968]

約数ペア:

[(1, 21380968), (2, 10690484), (4, 5345242), (7, 3054424), (8, 2672621), (14, 1527212), (17, 1257704), (28, 763606), (34, 628852), (37, 577864), (56, 381803), (68, 314426), (74, 288932), (119, 179672), (136, 157213), (148, 144466), (238, 89836), (259, 82552), (296, 72233), (476, 44918), (518, 41276), (607, 35224), (629, 33992), (952, 22459), (1036, 20638), (1214, 17612), (1258, 16996), (2072, 10319), (2428, 8806), (2516, 8498), (4249, 5032), (4403, 4856)]