18156890

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{887}}^1$

素因数の和:1006

約数の個数: 32

約数和(自身を含む): 34525440

約数和(自身を除く): 16368550

約数列:

[1, 2, 5, 10, 23, 46, 89, 115, 178, 230, 445, 887, 890, 1774, 2047, 4094, 4435, 8870, 10235, 20401, 20470, 40802, 78943, 102005, 157886, 204010, 394715, 789430, 1815689, 3631378, 9078445, 18156890]

約数ペア:

[(1, 18156890), (2, 9078445), (5, 3631378), (10, 1815689), (23, 789430), (46, 394715), (89, 204010), (115, 157886), (178, 102005), (230, 78943), (445, 40802), (887, 20470), (890, 20401), (1774, 10235), (2047, 8870), (4094, 4435)]