20175561

素因数分解:

$3^5\times 7^1\times {\mathrm{29}}^1\times {\mathrm{409}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 35817600

約数和(自身を除く): 15642039

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 243, 261, 409, 567, 609, 783, 1227, 1701, 1827, 2349, 2863, 3681, 5481, 7047, 8589, 11043, 11861, 16443, 25767, 33129, 35583, 49329, 77301, 83027, 99387, 106749, 231903, 249081, 320247, 695709, 747243, 960741, 2241729, 2882223, 6725187, 20175561]

約数ペア:

[(1, 20175561), (3, 6725187), (7, 2882223), (9, 2241729), (21, 960741), (27, 747243), (29, 695709), (63, 320247), (81, 249081), (87, 231903), (189, 106749), (203, 99387), (243, 83027), (261, 77301), (409, 49329), (567, 35583), (609, 33129), (783, 25767), (1227, 16443), (1701, 11861), (1827, 11043), (2349, 8589), (2863, 7047), (3681, 5481)]