19986309

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{283}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 35443200

約数和(自身を除く): 15456891

約数列:

[1, 3, 7, 9, 19, 21, 57, 59, 63, 133, 171, 177, 283, 399, 413, 531, 849, 1121, 1197, 1239, 1981, 2547, 3363, 3717, 5377, 5943, 7847, 10089, 16131, 16697, 17829, 23541, 37639, 48393, 50091, 70623, 112917, 116879, 150273, 317243, 338751, 350637, 951729, 1051911, 2220701, 2855187, 6662103, 19986309]

約数ペア:

[(1, 19986309), (3, 6662103), (7, 2855187), (9, 2220701), (19, 1051911), (21, 951729), (57, 350637), (59, 338751), (63, 317243), (133, 150273), (171, 116879), (177, 112917), (283, 70623), (399, 50091), (413, 48393), (531, 37639), (849, 23541), (1121, 17829), (1197, 16697), (1239, 16131), (1981, 10089), (2547, 7847), (3363, 5943), (3717, 5377)]