18991310

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{421}}^1$

素因数の和:788

約数の個数: 32

約数和(自身を含む): 37007712

約数和(自身を除く): 18016402

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 347, 421, 694, 842, 1735, 2105, 3470, 4210, 4511, 5473, 9022, 10946, 22555, 27365, 45110, 54730, 146087, 292174, 730435, 1460870, 1899131, 3798262, 9495655, 18991310]

約数ペア:

[(1, 18991310), (2, 9495655), (5, 3798262), (10, 1899131), (13, 1460870), (26, 730435), (65, 292174), (130, 146087), (347, 54730), (421, 45110), (694, 27365), (842, 22555), (1735, 10946), (2105, 9022), (3470, 5473), (4210, 4511)]