20890263

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{2609}}^1$

素因数の和:2786

約数の個数: 16

約数和(自身を含む): 29691360

約数和(自身を除く): 8801097

約数列:

[1, 3, 17, 51, 157, 471, 2609, 2669, 7827, 8007, 44353, 133059, 409613, 1228839, 6963421, 20890263]

約数ペア:

[(1, 20890263), (3, 6963421), (17, 1228839), (51, 409613), (157, 133059), (471, 44353), (2609, 8007), (2669, 7827)]