20688656

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{787}}^1$

素因数の和:879

約数の個数: 40

約数和(自身を含む): 42211584

約数和(自身を除く): 21522928

約数列:

[1, 2, 4, 8, 16, 31, 53, 62, 106, 124, 212, 248, 424, 496, 787, 848, 1574, 1643, 3148, 3286, 6296, 6572, 12592, 13144, 24397, 26288, 41711, 48794, 83422, 97588, 166844, 195176, 333688, 390352, 667376, 1293041, 2586082, 5172164, 10344328, 20688656]

約数ペア:

[(1, 20688656), (2, 10344328), (4, 5172164), (8, 2586082), (16, 1293041), (31, 667376), (53, 390352), (62, 333688), (106, 195176), (124, 166844), (212, 97588), (248, 83422), (424, 48794), (496, 41711), (787, 26288), (848, 24397), (1574, 13144), (1643, 12592), (3148, 6572), (3286, 6296)]