20909520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{257}}^1$

素因数の和:389

約数の個数: 120

約数和(自身を含む): 71118216

約数和(自身を除く): 50208696

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 113, 120, 144, 180, 226, 240, 257, 339, 360, 452, 514, 565, 678, 720, 771, 904, 1017, 1028, 1130, 1285, 1356, 1542, 1695, 1808, 2034, 2056, 2260, 2313, 2570, 2712, 3084, 3390, 3855, 4068, 4112, 4520, 4626, 5085, 5140, 5424, 6168, 6780, 7710, 8136, 9040, 9252, 10170, 10280, 11565, 12336, 13560, 15420, 16272, 18504, 20340, 20560, 23130, 27120, 29041, 30840, 37008, 40680, 46260, 58082, 61680, 81360, 87123, 92520, 116164, 145205, 174246, 185040, 232328, 261369, 290410, 348492, 435615, 464656, 522738, 580820, 696984, 871230, 1045476, 1161640, 1306845, 1393968, 1742460, 2090952, 2323280, 2613690, 3484920, 4181904, 5227380, 6969840, 10454760, 20909520]

約数ペア:

[(1, 20909520), (2, 10454760), (3, 6969840), (4, 5227380), (5, 4181904), (6, 3484920), (8, 2613690), (9, 2323280), (10, 2090952), (12, 1742460), (15, 1393968), (16, 1306845), (18, 1161640), (20, 1045476), (24, 871230), (30, 696984), (36, 580820), (40, 522738), (45, 464656), (48, 435615), (60, 348492), (72, 290410), (80, 261369), (90, 232328), (113, 185040), (120, 174246), (144, 145205), (180, 116164), (226, 92520), (240, 87123), (257, 81360), (339, 61680), (360, 58082), (452, 46260), (514, 40680), (565, 37008), (678, 30840), (720, 29041), (771, 27120), (904, 23130), (1017, 20560), (1028, 20340), (1130, 18504), (1285, 16272), (1356, 15420), (1542, 13560), (1695, 12336), (1808, 11565), (2034, 10280), (2056, 10170), (2260, 9252), (2313, 9040), (2570, 8136), (2712, 7710), (3084, 6780), (3390, 6168), (3855, 5424), (4068, 5140), (4112, 5085), (4520, 4626)]