19973205

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{389}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 39911040

約数和(自身を除く): 19937835

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 163, 315, 389, 489, 815, 1141, 1167, 1467, 1945, 2445, 2723, 3423, 3501, 5705, 5835, 7335, 8169, 10269, 13615, 17115, 17505, 24507, 40845, 51345, 63407, 122535, 190221, 317035, 443849, 570663, 951105, 1331547, 2219245, 2853315, 3994641, 6657735, 19973205]

約数ペア:

[(1, 19973205), (3, 6657735), (5, 3994641), (7, 2853315), (9, 2219245), (15, 1331547), (21, 951105), (35, 570663), (45, 443849), (63, 317035), (105, 190221), (163, 122535), (315, 63407), (389, 51345), (489, 40845), (815, 24507), (1141, 17505), (1167, 17115), (1467, 13615), (1945, 10269), (2445, 8169), (2723, 7335), (3423, 5835), (3501, 5705)]