21997155

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{977}}^1$

素因数の和:1083

約数の個数: 32

約数和(自身を含む): 37555200

約数和(自身を除く): 15558045

約数列:

[1, 3, 5, 15, 19, 57, 79, 95, 237, 285, 395, 977, 1185, 1501, 2931, 4503, 4885, 7505, 14655, 18563, 22515, 55689, 77183, 92815, 231549, 278445, 385915, 1157745, 1466477, 4399431, 7332385, 21997155]

約数ペア:

[(1, 21997155), (3, 7332385), (5, 4399431), (15, 1466477), (19, 1157745), (57, 385915), (79, 278445), (95, 231549), (237, 92815), (285, 77183), (395, 55689), (977, 22515), (1185, 18563), (1501, 14655), (2931, 7505), (4503, 4885)]