21302560

素因数分解:

$2^5\times 5^1\times {\mathrm{211}}^1\times {\mathrm{631}}^1$

素因数の和:857

約数の個数: 48

約数和(自身を含む): 50645952

約数和(自身を除く): 29343392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 211, 422, 631, 844, 1055, 1262, 1688, 2110, 2524, 3155, 3376, 4220, 5048, 6310, 6752, 8440, 10096, 12620, 16880, 20192, 25240, 33760, 50480, 100960, 133141, 266282, 532564, 665705, 1065128, 1331410, 2130256, 2662820, 4260512, 5325640, 10651280, 21302560]

約数ペア:

[(1, 21302560), (2, 10651280), (4, 5325640), (5, 4260512), (8, 2662820), (10, 2130256), (16, 1331410), (20, 1065128), (32, 665705), (40, 532564), (80, 266282), (160, 133141), (211, 100960), (422, 50480), (631, 33760), (844, 25240), (1055, 20192), (1262, 16880), (1688, 12620), (2110, 10096), (2524, 8440), (3155, 6752), (3376, 6310), (4220, 5048)]