21405804

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{254831}}^1$

素因数の和:254845

約数の個数: 24

約数和(自身を含む): 57082368

約数和(自身を除く): 35676564

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 254831, 509662, 764493, 1019324, 1528986, 1783817, 3057972, 3567634, 5351451, 7135268, 10702902, 21405804]

約数ペア:

[(1, 21405804), (2, 10702902), (3, 7135268), (4, 5351451), (6, 3567634), (7, 3057972), (12, 1783817), (14, 1528986), (21, 1019324), (28, 764493), (42, 509662), (84, 254831)]