20587280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{379}}^1$

素因数の和:496

約数の個数: 80

約数和(自身を含む): 55413120

約数和(自身を除く): 34825840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 97, 112, 140, 194, 280, 379, 388, 485, 560, 679, 758, 776, 970, 1358, 1516, 1552, 1895, 1940, 2653, 2716, 3032, 3395, 3790, 3880, 5306, 5432, 6064, 6790, 7580, 7760, 10612, 10864, 13265, 13580, 15160, 21224, 26530, 27160, 30320, 36763, 42448, 53060, 54320, 73526, 106120, 147052, 183815, 212240, 257341, 294104, 367630, 514682, 588208, 735260, 1029364, 1286705, 1470520, 2058728, 2573410, 2941040, 4117456, 5146820, 10293640, 20587280]

約数ペア:

[(1, 20587280), (2, 10293640), (4, 5146820), (5, 4117456), (7, 2941040), (8, 2573410), (10, 2058728), (14, 1470520), (16, 1286705), (20, 1029364), (28, 735260), (35, 588208), (40, 514682), (56, 367630), (70, 294104), (80, 257341), (97, 212240), (112, 183815), (140, 147052), (194, 106120), (280, 73526), (379, 54320), (388, 53060), (485, 42448), (560, 36763), (679, 30320), (758, 27160), (776, 26530), (970, 21224), (1358, 15160), (1516, 13580), (1552, 13265), (1895, 10864), (1940, 10612), (2653, 7760), (2716, 7580), (3032, 6790), (3395, 6064), (3790, 5432), (3880, 5306)]