28017880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1721}}^1$

素因数の和:1780

約数の個数: 64

約数和(自身を含む): 70670880

約数和(自身を除く): 42653000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1480, 1628, 1721, 2035, 3256, 3442, 4070, 6884, 8140, 8605, 13768, 16280, 17210, 18931, 34420, 37862, 63677, 68840, 75724, 94655, 127354, 151448, 189310, 254708, 318385, 378620, 509416, 636770, 700447, 757240, 1273540, 1400894, 2547080, 2801788, 3502235, 5603576, 7004470, 14008940, 28017880]

約数ペア:

[(1, 28017880), (2, 14008940), (4, 7004470), (5, 5603576), (8, 3502235), (10, 2801788), (11, 2547080), (20, 1400894), (22, 1273540), (37, 757240), (40, 700447), (44, 636770), (55, 509416), (74, 378620), (88, 318385), (110, 254708), (148, 189310), (185, 151448), (220, 127354), (296, 94655), (370, 75724), (407, 68840), (440, 63677), (740, 37862), (814, 34420), (1480, 18931), (1628, 17210), (1721, 16280), (2035, 13768), (3256, 8605), (3442, 8140), (4070, 6884)]