21298970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:363

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 27085030

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 139, 154, 199, 278, 385, 398, 695, 770, 973, 995, 1390, 1393, 1529, 1946, 1990, 2189, 2786, 3058, 4378, 4865, 6965, 7645, 9730, 10703, 10945, 13930, 15290, 15323, 21406, 21890, 27661, 30646, 53515, 55322, 76615, 107030, 138305, 153230, 193627, 276610, 304271, 387254, 608542, 968135, 1521355, 1936270, 2129897, 3042710, 4259794, 10649485, 21298970]

約数ペア:

[(1, 21298970), (2, 10649485), (5, 4259794), (7, 3042710), (10, 2129897), (11, 1936270), (14, 1521355), (22, 968135), (35, 608542), (55, 387254), (70, 304271), (77, 276610), (110, 193627), (139, 153230), (154, 138305), (199, 107030), (278, 76615), (385, 55322), (398, 53515), (695, 30646), (770, 27661), (973, 21890), (995, 21406), (1390, 15323), (1393, 15290), (1529, 13930), (1946, 10945), (1990, 10703), (2189, 9730), (2786, 7645), (3058, 6965), (4378, 4865)]