20454280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{229}}^1$

素因数の和:287

約数の個数: 128

約数和(自身を含む): 59616000

約数和(自身を除く): 39161720

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 29, 35, 40, 44, 55, 56, 58, 70, 77, 88, 110, 116, 140, 145, 154, 203, 220, 229, 232, 280, 290, 308, 319, 385, 406, 440, 458, 580, 616, 638, 770, 812, 916, 1015, 1145, 1160, 1276, 1540, 1595, 1603, 1624, 1832, 2030, 2233, 2290, 2519, 2552, 3080, 3190, 3206, 4060, 4466, 4580, 5038, 6380, 6412, 6641, 8015, 8120, 8932, 9160, 10076, 11165, 12595, 12760, 12824, 13282, 16030, 17633, 17864, 20152, 22330, 25190, 26564, 32060, 33205, 35266, 44660, 46487, 50380, 53128, 64120, 66410, 70532, 73051, 88165, 89320, 92974, 100760, 132820, 141064, 146102, 176330, 185948, 232435, 265640, 292204, 352660, 365255, 371896, 464870, 511357, 584408, 705320, 730510, 929740, 1022714, 1461020, 1859480, 2045428, 2556785, 2922040, 4090856, 5113570, 10227140, 20454280]

約数ペア:

[(1, 20454280), (2, 10227140), (4, 5113570), (5, 4090856), (7, 2922040), (8, 2556785), (10, 2045428), (11, 1859480), (14, 1461020), (20, 1022714), (22, 929740), (28, 730510), (29, 705320), (35, 584408), (40, 511357), (44, 464870), (55, 371896), (56, 365255), (58, 352660), (70, 292204), (77, 265640), (88, 232435), (110, 185948), (116, 176330), (140, 146102), (145, 141064), (154, 132820), (203, 100760), (220, 92974), (229, 89320), (232, 88165), (280, 73051), (290, 70532), (308, 66410), (319, 64120), (385, 53128), (406, 50380), (440, 46487), (458, 44660), (580, 35266), (616, 33205), (638, 32060), (770, 26564), (812, 25190), (916, 22330), (1015, 20152), (1145, 17864), (1160, 17633), (1276, 16030), (1540, 13282), (1595, 12824), (1603, 12760), (1624, 12595), (1832, 11165), (2030, 10076), (2233, 9160), (2290, 8932), (2519, 8120), (2552, 8015), (3080, 6641), (3190, 6412), (3206, 6380), (4060, 5038), (4466, 4580)]