18340120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{211}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 43273440

約数和(自身を除く): 24933320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 53, 82, 106, 164, 205, 211, 212, 265, 328, 410, 422, 424, 530, 820, 844, 1055, 1060, 1640, 1688, 2110, 2120, 2173, 4220, 4346, 8440, 8651, 8692, 10865, 11183, 17302, 17384, 21730, 22366, 34604, 43255, 43460, 44732, 55915, 69208, 86510, 86920, 89464, 111830, 173020, 223660, 346040, 447320, 458503, 917006, 1834012, 2292515, 3668024, 4585030, 9170060, 18340120]

約数ペア:

[(1, 18340120), (2, 9170060), (4, 4585030), (5, 3668024), (8, 2292515), (10, 1834012), (20, 917006), (40, 458503), (41, 447320), (53, 346040), (82, 223660), (106, 173020), (164, 111830), (205, 89464), (211, 86920), (212, 86510), (265, 69208), (328, 55915), (410, 44732), (422, 43460), (424, 43255), (530, 34604), (820, 22366), (844, 21730), (1055, 17384), (1060, 17302), (1640, 11183), (1688, 10865), (2110, 8692), (2120, 8651), (2173, 8440), (4220, 4346)]