20989492

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:376

約数の個数: 36

約数和(自身を含む): 39747904

約数和(自身を除く): 18758412

約数列:

[1, 2, 4, 17, 34, 67, 68, 134, 268, 271, 289, 542, 578, 1084, 1139, 1156, 2278, 4556, 4607, 9214, 18157, 18428, 19363, 36314, 38726, 72628, 77452, 78319, 156638, 308669, 313276, 617338, 1234676, 5247373, 10494746, 20989492]

約数ペア:

[(1, 20989492), (2, 10494746), (4, 5247373), (17, 1234676), (34, 617338), (67, 313276), (68, 308669), (134, 156638), (268, 78319), (271, 77452), (289, 72628), (542, 38726), (578, 36314), (1084, 19363), (1139, 18428), (1156, 18157), (2278, 9214), (4556, 4607)]