20787520

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:312

約数の個数: 112

約数和(自身を含む): 56327040

約数和(自身を除く): 35539520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 263, 304, 320, 380, 416, 494, 520, 526, 608, 760, 832, 988, 1040, 1052, 1216, 1235, 1315, 1520, 1976, 2080, 2104, 2470, 2630, 3040, 3419, 3952, 4160, 4208, 4940, 4997, 5260, 6080, 6838, 7904, 8416, 9880, 9994, 10520, 13676, 15808, 16832, 17095, 19760, 19988, 21040, 24985, 27352, 34190, 39520, 39976, 42080, 49970, 54704, 64961, 68380, 79040, 79952, 84160, 99940, 109408, 129922, 136760, 159904, 199880, 218816, 259844, 273520, 319808, 324805, 399760, 519688, 547040, 649610, 799520, 1039376, 1094080, 1299220, 1599040, 2078752, 2598440, 4157504, 5196880, 10393760, 20787520]

約数ペア:

[(1, 20787520), (2, 10393760), (4, 5196880), (5, 4157504), (8, 2598440), (10, 2078752), (13, 1599040), (16, 1299220), (19, 1094080), (20, 1039376), (26, 799520), (32, 649610), (38, 547040), (40, 519688), (52, 399760), (64, 324805), (65, 319808), (76, 273520), (80, 259844), (95, 218816), (104, 199880), (130, 159904), (152, 136760), (160, 129922), (190, 109408), (208, 99940), (247, 84160), (260, 79952), (263, 79040), (304, 68380), (320, 64961), (380, 54704), (416, 49970), (494, 42080), (520, 39976), (526, 39520), (608, 34190), (760, 27352), (832, 24985), (988, 21040), (1040, 19988), (1052, 19760), (1216, 17095), (1235, 16832), (1315, 15808), (1520, 13676), (1976, 10520), (2080, 9994), (2104, 9880), (2470, 8416), (2630, 7904), (3040, 6838), (3419, 6080), (3952, 5260), (4160, 4997), (4208, 4940)]