20851545

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{9721}}^1$

素因数の和:9753

約数の個数: 32

約数和(自身を含む): 39199104

約数和(自身を除く): 18347559

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 65, 143, 165, 195, 429, 715, 2145, 9721, 29163, 48605, 106931, 126373, 145815, 320793, 379119, 534655, 631865, 1390103, 1603965, 1895595, 4170309, 6950515, 20851545]

約数ペア:

[(1, 20851545), (3, 6950515), (5, 4170309), (11, 1895595), (13, 1603965), (15, 1390103), (33, 631865), (39, 534655), (55, 379119), (65, 320793), (143, 145815), (165, 126373), (195, 106931), (429, 48605), (715, 29163), (2145, 9721)]