21349720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76249}}^1$

素因数の和:76267

約数の個数: 32

約数和(自身を含む): 54900000

約数和(自身を除く): 33550280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76249, 152498, 304996, 381245, 533743, 609992, 762490, 1067486, 1524980, 2134972, 2668715, 3049960, 4269944, 5337430, 10674860, 21349720]

約数ペア:

[(1, 21349720), (2, 10674860), (4, 5337430), (5, 4269944), (7, 3049960), (8, 2668715), (10, 2134972), (14, 1524980), (20, 1067486), (28, 762490), (35, 609992), (40, 533743), (56, 381245), (70, 304996), (140, 152498), (280, 76249)]