20489580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1279}}^1$

素因数の和:1383

約数の個数: 72

約数和(自身を含む): 62899200

約数和(自身を除く): 42409620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1279, 1335, 1602, 1780, 2558, 2670, 3204, 3837, 4005, 5116, 5340, 6395, 7674, 8010, 11511, 12790, 15348, 16020, 19185, 23022, 25580, 38370, 46044, 57555, 76740, 113831, 115110, 227662, 230220, 341493, 455324, 569155, 682986, 1024479, 1138310, 1365972, 1707465, 2048958, 2276620, 3414930, 4097916, 5122395, 6829860, 10244790, 20489580]

約数ペア:

[(1, 20489580), (2, 10244790), (3, 6829860), (4, 5122395), (5, 4097916), (6, 3414930), (9, 2276620), (10, 2048958), (12, 1707465), (15, 1365972), (18, 1138310), (20, 1024479), (30, 682986), (36, 569155), (45, 455324), (60, 341493), (89, 230220), (90, 227662), (178, 115110), (180, 113831), (267, 76740), (356, 57555), (445, 46044), (534, 38370), (801, 25580), (890, 23022), (1068, 19185), (1279, 16020), (1335, 15348), (1602, 12790), (1780, 11511), (2558, 8010), (2670, 7674), (3204, 6395), (3837, 5340), (4005, 5116)]