20449240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{367}}^1$

素因数の和:584

約数の個数: 64

約数和(自身を含む): 52992000

約数和(自身を除く): 32542760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 199, 280, 367, 398, 734, 796, 995, 1393, 1468, 1592, 1835, 1990, 2569, 2786, 2936, 3670, 3980, 5138, 5572, 6965, 7340, 7960, 10276, 11144, 12845, 13930, 14680, 20552, 25690, 27860, 51380, 55720, 73033, 102760, 146066, 292132, 365165, 511231, 584264, 730330, 1022462, 1460660, 2044924, 2556155, 2921320, 4089848, 5112310, 10224620, 20449240]

約数ペア:

[(1, 20449240), (2, 10224620), (4, 5112310), (5, 4089848), (7, 2921320), (8, 2556155), (10, 2044924), (14, 1460660), (20, 1022462), (28, 730330), (35, 584264), (40, 511231), (56, 365165), (70, 292132), (140, 146066), (199, 102760), (280, 73033), (367, 55720), (398, 51380), (734, 27860), (796, 25690), (995, 20552), (1393, 14680), (1468, 13930), (1592, 12845), (1835, 11144), (1990, 10276), (2569, 7960), (2786, 7340), (2936, 6965), (3670, 5572), (3980, 5138)]