19808140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{503}}^1$

素因数の和:702

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 25914740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 179, 220, 358, 503, 716, 895, 1006, 1790, 1969, 2012, 2515, 3580, 3938, 5030, 5533, 7876, 9845, 10060, 11066, 19690, 22132, 27665, 39380, 55330, 90037, 110660, 180074, 360148, 450185, 900370, 990407, 1800740, 1980814, 3961628, 4952035, 9904070, 19808140]

約数ペア:

[(1, 19808140), (2, 9904070), (4, 4952035), (5, 3961628), (10, 1980814), (11, 1800740), (20, 990407), (22, 900370), (44, 450185), (55, 360148), (110, 180074), (179, 110660), (220, 90037), (358, 55330), (503, 39380), (716, 27665), (895, 22132), (1006, 19690), (1790, 11066), (1969, 10060), (2012, 9845), (2515, 7876), (3580, 5533), (3938, 5030)]