20611980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{373}}^1$

素因数の和:695

約数の個数: 72

約数和(自身を含む): 62894832

約数和(自身を除く): 42282852

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 307, 373, 614, 746, 921, 1119, 1228, 1492, 1535, 1842, 1865, 2238, 2763, 3070, 3357, 3684, 3730, 4476, 4605, 5526, 5595, 6140, 6714, 7460, 9210, 11052, 11190, 13428, 13815, 16785, 18420, 22380, 27630, 33570, 55260, 67140, 114511, 229022, 343533, 458044, 572555, 687066, 1030599, 1145110, 1374132, 1717665, 2061198, 2290220, 3435330, 4122396, 5152995, 6870660, 10305990, 20611980]

約数ペア:

[(1, 20611980), (2, 10305990), (3, 6870660), (4, 5152995), (5, 4122396), (6, 3435330), (9, 2290220), (10, 2061198), (12, 1717665), (15, 1374132), (18, 1145110), (20, 1030599), (30, 687066), (36, 572555), (45, 458044), (60, 343533), (90, 229022), (180, 114511), (307, 67140), (373, 55260), (614, 33570), (746, 27630), (921, 22380), (1119, 18420), (1228, 16785), (1492, 13815), (1535, 13428), (1842, 11190), (1865, 11052), (2238, 9210), (2763, 7460), (3070, 6714), (3357, 6140), (3684, 5595), (3730, 5526), (4476, 4605)]