20948840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1013}}^1$

素因数の和:1082

約数の個数: 64

約数和(自身を含む): 52565760

約数和(自身を除く): 31616920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 1013, 1034, 1880, 2026, 2068, 2585, 4052, 4136, 5065, 5170, 8104, 10130, 10340, 11143, 20260, 20680, 22286, 40520, 44572, 47611, 55715, 89144, 95222, 111430, 190444, 222860, 238055, 380888, 445720, 476110, 523721, 952220, 1047442, 1904440, 2094884, 2618605, 4189768, 5237210, 10474420, 20948840]

約数ペア:

[(1, 20948840), (2, 10474420), (4, 5237210), (5, 4189768), (8, 2618605), (10, 2094884), (11, 1904440), (20, 1047442), (22, 952220), (40, 523721), (44, 476110), (47, 445720), (55, 380888), (88, 238055), (94, 222860), (110, 190444), (188, 111430), (220, 95222), (235, 89144), (376, 55715), (440, 47611), (470, 44572), (517, 40520), (940, 22286), (1013, 20680), (1034, 20260), (1880, 11143), (2026, 10340), (2068, 10130), (2585, 8104), (4052, 5170), (4136, 5065)]