638956215

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{205783}}^1$

素因数の和:205820

約数の個数: 32

約数和(自身を含む): 1185315840

約数和(自身を除く): 546359625

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 205783, 617349, 1028915, 1852047, 3086745, 4733009, 5556141, 9260235, 14199027, 23665045, 27780705, 42597081, 70995135, 127791243, 212985405, 638956215]

約数ペア:

[(1, 638956215), (3, 212985405), (5, 127791243), (9, 70995135), (15, 42597081), (23, 27780705), (27, 23665045), (45, 14199027), (69, 9260235), (115, 5556141), (135, 4733009), (207, 3086745), (345, 1852047), (621, 1028915), (1035, 617349), (3105, 205783)]