261639170

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1\times {\mathrm{4099}}^1$

素因数の和:4610

約数の個数: 32

約数和(自身を含む): 508334400

約数和(自身を除く): 246695230

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 491, 982, 2455, 4099, 4910, 6383, 8198, 12766, 20495, 31915, 40990, 53287, 63830, 106574, 266435, 532870, 2012609, 4025218, 10063045, 20126090, 26163917, 52327834, 130819585, 261639170]

約数ペア:

[(1, 261639170), (2, 130819585), (5, 52327834), (10, 26163917), (13, 20126090), (26, 10063045), (65, 4025218), (130, 2012609), (491, 532870), (982, 266435), (2455, 106574), (4099, 63830), (4910, 53287), (6383, 40990), (8198, 31915), (12766, 20495)]