21870915

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{1597}}^1$

素因数の和:1699

約数の個数: 32

約数和(自身を含む): 38658816

約数和(自身を除く): 16787901

約数列:

[1, 3, 5, 11, 15, 33, 55, 83, 165, 249, 415, 913, 1245, 1597, 2739, 4565, 4791, 7985, 13695, 17567, 23955, 52701, 87835, 132551, 263505, 397653, 662755, 1458061, 1988265, 4374183, 7290305, 21870915]

約数ペア:

[(1, 21870915), (3, 7290305), (5, 4374183), (11, 1988265), (15, 1458061), (33, 662755), (55, 397653), (83, 263505), (165, 132551), (249, 87835), (415, 52701), (913, 23955), (1245, 17567), (1597, 13695), (2739, 7985), (4565, 4791)]