20990925

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3217}}^1$

素因数の和:3262

約数の個数: 36

約数和(自身を含む): 38905620

約数和(自身を除く): 17914695

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3217, 6525, 9651, 16085, 28953, 48255, 80425, 93293, 144765, 241275, 279879, 466465, 723825, 839637, 1399395, 2332325, 4198185, 6996975, 20990925]

約数ペア:

[(1, 20990925), (3, 6996975), (5, 4198185), (9, 2332325), (15, 1399395), (25, 839637), (29, 723825), (45, 466465), (75, 279879), (87, 241275), (145, 144765), (225, 93293), (261, 80425), (435, 48255), (725, 28953), (1305, 16085), (2175, 9651), (3217, 6525)]