20487796

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^2\times {\mathrm{163}}^1$

素因数の和:308

約数の個数: 36

約数和(自身を含む): 41851488

約数和(自身を除く): 21363692

約数列:

[1, 2, 4, 7, 14, 28, 67, 134, 163, 268, 326, 469, 652, 938, 1141, 1876, 2282, 4489, 4564, 8978, 10921, 17956, 21842, 31423, 43684, 62846, 76447, 125692, 152894, 305788, 731707, 1463414, 2926828, 5121949, 10243898, 20487796]

約数ペア:

[(1, 20487796), (2, 10243898), (4, 5121949), (7, 2926828), (14, 1463414), (28, 731707), (67, 305788), (134, 152894), (163, 125692), (268, 76447), (326, 62846), (469, 43684), (652, 31423), (938, 21842), (1141, 17956), (1876, 10921), (2282, 8978), (4489, 4564)]