20517321

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{761}}^1$

素因数の和:837

約数の個数: 32

約数和(自身を含む): 32186880

約数和(自身を除く): 11669559

約数列:

[1, 3, 11, 19, 33, 43, 57, 129, 209, 473, 627, 761, 817, 1419, 2283, 2451, 8371, 8987, 14459, 25113, 26961, 32723, 43377, 98169, 159049, 359953, 477147, 621737, 1079859, 1865211, 6839107, 20517321]

約数ペア:

[(1, 20517321), (3, 6839107), (11, 1865211), (19, 1079859), (33, 621737), (43, 477147), (57, 359953), (129, 159049), (209, 98169), (473, 43377), (627, 32723), (761, 26961), (817, 25113), (1419, 14459), (2283, 8987), (2451, 8371)]