51281720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{7963}}^1$

素因数の和:8004

約数の個数: 64

約数和(自身を含む): 137617920

約数和(自身を除く): 86336200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440, 7963, 15926, 31852, 39815, 55741, 63704, 79630, 111482, 159260, 183149, 222964, 278705, 318520, 366298, 445928, 557410, 732596, 915745, 1114820, 1282043, 1465192, 1831490, 2229640, 2564086, 3662980, 5128172, 6410215, 7325960, 10256344, 12820430, 25640860, 51281720]

約数ペア:

[(1, 51281720), (2, 25640860), (4, 12820430), (5, 10256344), (7, 7325960), (8, 6410215), (10, 5128172), (14, 3662980), (20, 2564086), (23, 2229640), (28, 1831490), (35, 1465192), (40, 1282043), (46, 1114820), (56, 915745), (70, 732596), (92, 557410), (115, 445928), (140, 366298), (161, 318520), (184, 278705), (230, 222964), (280, 183149), (322, 159260), (460, 111482), (644, 79630), (805, 63704), (920, 55741), (1288, 39815), (1610, 31852), (3220, 15926), (6440, 7963)]