21176869

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{127}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 25740288

約数和(自身を除く): 4563419

約数列:

[1, 7, 41, 49, 83, 127, 287, 581, 889, 2009, 3403, 4067, 5207, 6223, 10541, 23821, 36449, 73787, 166747, 255143, 432181, 516509, 3025267, 21176869]

約数ペア:

[(1, 21176869), (7, 3025267), (41, 516509), (49, 432181), (83, 255143), (127, 166747), (287, 73787), (581, 36449), (889, 23821), (2009, 10541), (3403, 6223), (4067, 5207)]