18001280

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{2557}}^1$

素因数の和:2587

約数の個数: 64

約数和(自身を含む): 46964880

約数和(自身を除く): 28963600

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 320, 352, 440, 640, 704, 880, 1408, 1760, 2557, 3520, 5114, 7040, 10228, 12785, 20456, 25570, 28127, 40912, 51140, 56254, 81824, 102280, 112508, 140635, 163648, 204560, 225016, 281270, 327296, 409120, 450032, 562540, 818240, 900064, 1125080, 1636480, 1800128, 2250160, 3600256, 4500320, 9000640, 18001280]

約数ペア:

[(1, 18001280), (2, 9000640), (4, 4500320), (5, 3600256), (8, 2250160), (10, 1800128), (11, 1636480), (16, 1125080), (20, 900064), (22, 818240), (32, 562540), (40, 450032), (44, 409120), (55, 327296), (64, 281270), (80, 225016), (88, 204560), (110, 163648), (128, 140635), (160, 112508), (176, 102280), (220, 81824), (320, 56254), (352, 51140), (440, 40912), (640, 28127), (704, 25570), (880, 20456), (1408, 12785), (1760, 10228), (2557, 7040), (3520, 5114)]