21000891236

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{953}}^1\times {\mathrm{423781}}^1$

素因数の和:424751

約数の個数: 24

約数和(自身を含む): 39620226744

約数和(自身を除く): 18619335508

約数列:

[1, 2, 4, 13, 26, 52, 953, 1906, 3812, 12389, 24778, 49556, 423781, 847562, 1695124, 5509153, 11018306, 22036612, 403863293, 807726586, 1615453172, 5250222809, 10500445618, 21000891236]

約数ペア:

[(1, 21000891236), (2, 10500445618), (4, 5250222809), (13, 1615453172), (26, 807726586), (52, 403863293), (953, 22036612), (1906, 11018306), (3812, 5509153), (12389, 1695124), (24778, 847562), (49556, 423781)]