20540065

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6449}}^1$

素因数の和:6481

約数の個数: 24

約数和(自身を含む): 30882600

約数和(自身を除く): 10342535

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6449, 32245, 45143, 83837, 225715, 316001, 419185, 586859, 1580005, 2934295, 4108013, 20540065]

約数ペア:

[(1, 20540065), (5, 4108013), (7, 2934295), (13, 1580005), (35, 586859), (49, 419185), (65, 316001), (91, 225715), (245, 83837), (455, 45143), (637, 32245), (3185, 6449)]