21000984040

素因数分解:

$2^3\times 5^1\times {\mathrm{11161}}^1\times {\mathrm{47041}}^1$

素因数の和:58213

約数の個数: 32

約数和(自身を含む): 47257452360

約数和(自身を除く): 26256468320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 11161, 22322, 44644, 47041, 55805, 89288, 94082, 111610, 188164, 223220, 235205, 376328, 446440, 470410, 940820, 1881640, 525024601, 1050049202, 2100098404, 2625123005, 4200196808, 5250246010, 10500492020, 21000984040]

約数ペア:

[(1, 21000984040), (2, 10500492020), (4, 5250246010), (5, 4200196808), (8, 2625123005), (10, 2100098404), (20, 1050049202), (40, 525024601), (11161, 1881640), (22322, 940820), (44644, 470410), (47041, 446440), (55805, 376328), (89288, 235205), (94082, 223220), (111610, 188164)]