20485720

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{983}}^1$

素因数の和:1515

約数の個数: 32

約数和(自身を含む): 46228320

約数和(自身を除く): 25742600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 983, 1042, 1966, 2084, 2605, 3932, 4168, 4915, 5210, 7864, 9830, 10420, 19660, 20840, 39320, 512143, 1024286, 2048572, 2560715, 4097144, 5121430, 10242860, 20485720]

約数ペア:

[(1, 20485720), (2, 10242860), (4, 5121430), (5, 4097144), (8, 2560715), (10, 2048572), (20, 1024286), (40, 512143), (521, 39320), (983, 20840), (1042, 19660), (1966, 10420), (2084, 9830), (2605, 7864), (3932, 5210), (4168, 4915)]