20781648

素因数分解:

$2^4\times 3^2\times {\mathrm{277}}^1\times {\mathrm{521}}^1$

素因数の和:812

約数の個数: 60

約数和(自身を含む): 58481748

約数和(自身を除く): 37700100

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, 277, 521, 554, 831, 1042, 1108, 1563, 1662, 2084, 2216, 2493, 3126, 3324, 4168, 4432, 4689, 4986, 6252, 6648, 8336, 9378, 9972, 12504, 13296, 18756, 19944, 25008, 37512, 39888, 75024, 144317, 288634, 432951, 577268, 865902, 1154536, 1298853, 1731804, 2309072, 2597706, 3463608, 5195412, 6927216, 10390824, 20781648]

約数ペア:

[(1, 20781648), (2, 10390824), (3, 6927216), (4, 5195412), (6, 3463608), (8, 2597706), (9, 2309072), (12, 1731804), (16, 1298853), (18, 1154536), (24, 865902), (36, 577268), (48, 432951), (72, 288634), (144, 144317), (277, 75024), (521, 39888), (554, 37512), (831, 25008), (1042, 19944), (1108, 18756), (1563, 13296), (1662, 12504), (2084, 9972), (2216, 9378), (2493, 8336), (3126, 6648), (3324, 6252), (4168, 4986), (4432, 4689)]