20745520

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1229}}^1$

素因数の和:1453

約数の個数: 40

約数和(自身を含む): 48501360

約数和(自身を除く): 27755840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1229, 1688, 2110, 2458, 3376, 4220, 4916, 6145, 8440, 9832, 12290, 16880, 19664, 24580, 49160, 98320, 259319, 518638, 1037276, 1296595, 2074552, 2593190, 4149104, 5186380, 10372760, 20745520]

約数ペア:

[(1, 20745520), (2, 10372760), (4, 5186380), (5, 4149104), (8, 2593190), (10, 2074552), (16, 1296595), (20, 1037276), (40, 518638), (80, 259319), (211, 98320), (422, 49160), (844, 24580), (1055, 19664), (1229, 16880), (1688, 12290), (2110, 9832), (2458, 8440), (3376, 6145), (4220, 4916)]