21781695

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5879}}^1$

素因数の和:5919

約数の個数: 32

約数和(自身を含む): 39513600

約数和(自身を除く): 17731905

約数列:

[1, 3, 5, 13, 15, 19, 39, 57, 65, 95, 195, 247, 285, 741, 1235, 3705, 5879, 17637, 29395, 76427, 88185, 111701, 229281, 335103, 382135, 558505, 1146405, 1452113, 1675515, 4356339, 7260565, 21781695]

約数ペア:

[(1, 21781695), (3, 7260565), (5, 4356339), (13, 1675515), (15, 1452113), (19, 1146405), (39, 558505), (57, 382135), (65, 335103), (95, 229281), (195, 111701), (247, 88185), (285, 76427), (741, 29395), (1235, 17637), (3705, 5879)]