20597020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{239}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 24561380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 139, 155, 239, 278, 310, 478, 556, 620, 695, 956, 1195, 1390, 2390, 2780, 4309, 4780, 7409, 8618, 14818, 17236, 21545, 29636, 33221, 37045, 43090, 66442, 74090, 86180, 132884, 148180, 166105, 332210, 664420, 1029851, 2059702, 4119404, 5149255, 10298510, 20597020]

約数ペア:

[(1, 20597020), (2, 10298510), (4, 5149255), (5, 4119404), (10, 2059702), (20, 1029851), (31, 664420), (62, 332210), (124, 166105), (139, 148180), (155, 132884), (239, 86180), (278, 74090), (310, 66442), (478, 43090), (556, 37045), (620, 33221), (695, 29636), (956, 21545), (1195, 17236), (1390, 14818), (2390, 8618), (2780, 7409), (4309, 4780)]