19900496

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{557}}^1$

素因数の和:612

約数の個数: 80

約数和(自身を含む): 49818240

約数和(自身を除く): 29917744

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 29, 44, 56, 58, 77, 88, 112, 116, 154, 176, 203, 232, 308, 319, 406, 464, 557, 616, 638, 812, 1114, 1232, 1276, 1624, 2228, 2233, 2552, 3248, 3899, 4456, 4466, 5104, 6127, 7798, 8912, 8932, 12254, 15596, 16153, 17864, 24508, 31192, 32306, 35728, 42889, 49016, 62384, 64612, 85778, 98032, 113071, 129224, 171556, 177683, 226142, 258448, 343112, 355366, 452284, 686224, 710732, 904568, 1243781, 1421464, 1809136, 2487562, 2842928, 4975124, 9950248, 19900496]

約数ペア:

[(1, 19900496), (2, 9950248), (4, 4975124), (7, 2842928), (8, 2487562), (11, 1809136), (14, 1421464), (16, 1243781), (22, 904568), (28, 710732), (29, 686224), (44, 452284), (56, 355366), (58, 343112), (77, 258448), (88, 226142), (112, 177683), (116, 171556), (154, 129224), (176, 113071), (203, 98032), (232, 85778), (308, 64612), (319, 62384), (406, 49016), (464, 42889), (557, 35728), (616, 32306), (638, 31192), (812, 24508), (1114, 17864), (1232, 16153), (1276, 15596), (1624, 12254), (2228, 8932), (2233, 8912), (2552, 7798), (3248, 6127), (3899, 5104), (4456, 4466)]