201991405

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{22811}}^1$

素因数の和:22857

約数の個数: 32

約数和(自身を含む): 315353088

約数和(自身を除く): 113361683

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 8855, 22811, 114055, 159677, 250921, 524653, 798385, 1254605, 1756447, 2623265, 3672571, 5771183, 8782235, 18362855, 28855915, 40398281, 201991405]

約数ペア:

[(1, 201991405), (5, 40398281), (7, 28855915), (11, 18362855), (23, 8782235), (35, 5771183), (55, 3672571), (77, 2623265), (115, 1756447), (161, 1254605), (253, 798385), (385, 524653), (805, 250921), (1265, 159677), (1771, 114055), (8855, 22811)]