21151305

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{809}}^1$

素因数の和:910

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 21305655

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 83, 105, 249, 315, 415, 581, 747, 809, 1245, 1743, 2427, 2905, 3735, 4045, 5229, 5663, 7281, 8715, 12135, 16989, 26145, 28315, 36405, 50967, 67147, 84945, 201441, 254835, 335735, 470029, 604323, 1007205, 1410087, 2350145, 3021615, 4230261, 7050435, 21151305]

約数ペア:

[(1, 21151305), (3, 7050435), (5, 4230261), (7, 3021615), (9, 2350145), (15, 1410087), (21, 1007205), (35, 604323), (45, 470029), (63, 335735), (83, 254835), (105, 201441), (249, 84945), (315, 67147), (415, 50967), (581, 36405), (747, 28315), (809, 26145), (1245, 16989), (1743, 12135), (2427, 8715), (2905, 7281), (3735, 5663), (4045, 5229)]