20591564

素因数分解:

$2^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{3389}}^1$

素因数の和:3438

約数の個数: 36

約数和(自身を含む): 43283520

約数和(自身を除く): 22691956

約数列:

[1, 2, 4, 7, 14, 28, 31, 49, 62, 98, 124, 196, 217, 434, 868, 1519, 3038, 3389, 6076, 6778, 13556, 23723, 47446, 94892, 105059, 166061, 210118, 332122, 420236, 664244, 735413, 1470826, 2941652, 5147891, 10295782, 20591564]

約数ペア:

[(1, 20591564), (2, 10295782), (4, 5147891), (7, 2941652), (14, 1470826), (28, 735413), (31, 664244), (49, 420236), (62, 332122), (98, 210118), (124, 166061), (196, 105059), (217, 94892), (434, 47446), (868, 23723), (1519, 13556), (3038, 6778), (3389, 6076)]