11987855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 16588800

約数和(自身を除く): 4600945

約数列:

[1, 5, 11, 31, 55, 79, 89, 155, 341, 395, 445, 869, 979, 1705, 2449, 2759, 4345, 4895, 7031, 12245, 13795, 26939, 30349, 35155, 77341, 134695, 151745, 217961, 386705, 1089805, 2397571, 11987855]

約数ペア:

[(1, 11987855), (5, 2397571), (11, 1089805), (31, 386705), (55, 217961), (79, 151745), (89, 134695), (155, 77341), (341, 35155), (395, 30349), (445, 26939), (869, 13795), (979, 12245), (1705, 7031), (2449, 4895), (2759, 4345)]