20258920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1123}}^1$

素因数の和:1186

約数の個数: 64

約数和(自身を含む): 50984640

約数和(自身を除く): 30725720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1123, 1640, 1804, 2246, 2255, 3608, 4492, 4510, 5615, 8984, 9020, 11230, 12353, 18040, 22460, 24706, 44920, 46043, 49412, 61765, 92086, 98824, 123530, 184172, 230215, 247060, 368344, 460430, 494120, 506473, 920860, 1012946, 1841720, 2025892, 2532365, 4051784, 5064730, 10129460, 20258920]

約数ペア:

[(1, 20258920), (2, 10129460), (4, 5064730), (5, 4051784), (8, 2532365), (10, 2025892), (11, 1841720), (20, 1012946), (22, 920860), (40, 506473), (41, 494120), (44, 460430), (55, 368344), (82, 247060), (88, 230215), (110, 184172), (164, 123530), (205, 98824), (220, 92086), (328, 61765), (410, 49412), (440, 46043), (451, 44920), (820, 24706), (902, 22460), (1123, 18040), (1640, 12353), (1804, 11230), (2246, 9020), (2255, 8984), (3608, 5615), (4492, 4510)]