19778440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{569}}^1$

素因数の和:670

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 29469560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 569, 632, 790, 869, 1138, 1580, 1738, 2276, 2845, 3160, 3476, 4345, 4552, 5690, 6259, 6952, 8690, 11380, 12518, 17380, 22760, 25036, 31295, 34760, 44951, 50072, 62590, 89902, 125180, 179804, 224755, 250360, 359608, 449510, 494461, 899020, 988922, 1798040, 1977844, 2472305, 3955688, 4944610, 9889220, 19778440]

約数ペア:

[(1, 19778440), (2, 9889220), (4, 4944610), (5, 3955688), (8, 2472305), (10, 1977844), (11, 1798040), (20, 988922), (22, 899020), (40, 494461), (44, 449510), (55, 359608), (79, 250360), (88, 224755), (110, 179804), (158, 125180), (220, 89902), (316, 62590), (395, 50072), (440, 44951), (569, 34760), (632, 31295), (790, 25036), (869, 22760), (1138, 17380), (1580, 12518), (1738, 11380), (2276, 8690), (2845, 6952), (3160, 6259), (3476, 5690), (4345, 4552)]