19831405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 27641088

約数和(自身を除く): 7809683

約数列:

[1, 5, 11, 23, 55, 61, 115, 253, 257, 305, 671, 1265, 1285, 1403, 2827, 3355, 5911, 7015, 14135, 15433, 15677, 29555, 65021, 77165, 78385, 172447, 325105, 360571, 862235, 1802855, 3966281, 19831405]

約数ペア:

[(1, 19831405), (5, 3966281), (11, 1802855), (23, 862235), (55, 360571), (61, 325105), (115, 172447), (253, 78385), (257, 77165), (305, 65021), (671, 29555), (1265, 15677), (1285, 15433), (1403, 14135), (2827, 7015), (3355, 5911)]