20477920

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{977}}^1$

素因数の和:1123

約数の個数: 48

約数和(自身を含む): 48798288

約数和(自身を除く): 28320368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 977, 1048, 1310, 1954, 2096, 2620, 3908, 4192, 4885, 5240, 7816, 9770, 10480, 15632, 19540, 20960, 31264, 39080, 78160, 127987, 156320, 255974, 511948, 639935, 1023896, 1279870, 2047792, 2559740, 4095584, 5119480, 10238960, 20477920]

約数ペア:

[(1, 20477920), (2, 10238960), (4, 5119480), (5, 4095584), (8, 2559740), (10, 2047792), (16, 1279870), (20, 1023896), (32, 639935), (40, 511948), (80, 255974), (131, 156320), (160, 127987), (262, 78160), (524, 39080), (655, 31264), (977, 20960), (1048, 19540), (1310, 15632), (1954, 10480), (2096, 9770), (2620, 7816), (3908, 5240), (4192, 4885)]