20645040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{509}}^1$

素因数の和:551

約数の個数: 120

約数和(自身を含む): 69437520

約数和(自身を除く): 48792480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 169, 195, 208, 240, 260, 312, 338, 390, 507, 509, 520, 624, 676, 780, 845, 1014, 1018, 1040, 1352, 1527, 1560, 1690, 2028, 2036, 2535, 2545, 2704, 3054, 3120, 3380, 4056, 4072, 5070, 5090, 6108, 6617, 6760, 7635, 8112, 8144, 10140, 10180, 12216, 13234, 13520, 15270, 19851, 20280, 20360, 24432, 26468, 30540, 33085, 39702, 40560, 40720, 52936, 61080, 66170, 79404, 86021, 99255, 105872, 122160, 132340, 158808, 172042, 198510, 258063, 264680, 317616, 344084, 397020, 430105, 516126, 529360, 688168, 794040, 860210, 1032252, 1290315, 1376336, 1588080, 1720420, 2064504, 2580630, 3440840, 4129008, 5161260, 6881680, 10322520, 20645040]

約数ペア:

[(1, 20645040), (2, 10322520), (3, 6881680), (4, 5161260), (5, 4129008), (6, 3440840), (8, 2580630), (10, 2064504), (12, 1720420), (13, 1588080), (15, 1376336), (16, 1290315), (20, 1032252), (24, 860210), (26, 794040), (30, 688168), (39, 529360), (40, 516126), (48, 430105), (52, 397020), (60, 344084), (65, 317616), (78, 264680), (80, 258063), (104, 198510), (120, 172042), (130, 158808), (156, 132340), (169, 122160), (195, 105872), (208, 99255), (240, 86021), (260, 79404), (312, 66170), (338, 61080), (390, 52936), (507, 40720), (509, 40560), (520, 39702), (624, 33085), (676, 30540), (780, 26468), (845, 24432), (1014, 20360), (1018, 20280), (1040, 19851), (1352, 15270), (1527, 13520), (1560, 13234), (1690, 12216), (2028, 10180), (2036, 10140), (2535, 8144), (2545, 8112), (2704, 7635), (3054, 6760), (3120, 6617), (3380, 6108), (4056, 5090), (4072, 5070)]