20780144

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:294

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 30216592

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 77, 88, 101, 112, 154, 167, 176, 202, 308, 334, 404, 616, 668, 707, 808, 1111, 1169, 1232, 1336, 1414, 1616, 1837, 2222, 2338, 2672, 2828, 3674, 4444, 4676, 5656, 7348, 7777, 8888, 9352, 11312, 12859, 14696, 15554, 16867, 17776, 18704, 25718, 29392, 31108, 33734, 51436, 62216, 67468, 102872, 118069, 124432, 134936, 185537, 205744, 236138, 269872, 371074, 472276, 742148, 944552, 1298759, 1484296, 1889104, 2597518, 2968592, 5195036, 10390072, 20780144]

約数ペア:

[(1, 20780144), (2, 10390072), (4, 5195036), (7, 2968592), (8, 2597518), (11, 1889104), (14, 1484296), (16, 1298759), (22, 944552), (28, 742148), (44, 472276), (56, 371074), (77, 269872), (88, 236138), (101, 205744), (112, 185537), (154, 134936), (167, 124432), (176, 118069), (202, 102872), (308, 67468), (334, 62216), (404, 51436), (616, 33734), (668, 31108), (707, 29392), (808, 25718), (1111, 18704), (1169, 17776), (1232, 16867), (1336, 15554), (1414, 14696), (1616, 12859), (1837, 11312), (2222, 9352), (2338, 8888), (2672, 7777), (2828, 7348), (3674, 5656), (4444, 4676)]