20264440

素因数分解:

$2^3\times 5^1\times 7^4\times {\mathrm{211}}^1$

素因数の和:250

約数の個数: 80

約数和(自身を含む): 53443080

約数和(自身を除く): 33178640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 211, 245, 280, 343, 392, 422, 490, 686, 844, 980, 1055, 1372, 1477, 1688, 1715, 1960, 2110, 2401, 2744, 2954, 3430, 4220, 4802, 5908, 6860, 7385, 8440, 9604, 10339, 11816, 12005, 13720, 14770, 19208, 20678, 24010, 29540, 41356, 48020, 51695, 59080, 72373, 82712, 96040, 103390, 144746, 206780, 289492, 361865, 413560, 506611, 578984, 723730, 1013222, 1447460, 2026444, 2533055, 2894920, 4052888, 5066110, 10132220, 20264440]

約数ペア:

[(1, 20264440), (2, 10132220), (4, 5066110), (5, 4052888), (7, 2894920), (8, 2533055), (10, 2026444), (14, 1447460), (20, 1013222), (28, 723730), (35, 578984), (40, 506611), (49, 413560), (56, 361865), (70, 289492), (98, 206780), (140, 144746), (196, 103390), (211, 96040), (245, 82712), (280, 72373), (343, 59080), (392, 51695), (422, 48020), (490, 41356), (686, 29540), (844, 24010), (980, 20678), (1055, 19208), (1372, 14770), (1477, 13720), (1688, 12005), (1715, 11816), (1960, 10339), (2110, 9604), (2401, 8440), (2744, 7385), (2954, 6860), (3430, 5908), (4220, 4802)]