21172917

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 30533760

約数和(自身を除く): 9360843

約数列:

[1, 3, 37, 53, 59, 61, 111, 159, 177, 183, 1961, 2183, 2257, 3127, 3233, 3599, 5883, 6549, 6771, 9381, 9699, 10797, 115699, 119621, 133163, 190747, 347097, 358863, 399489, 572241, 7057639, 21172917]

約数ペア:

[(1, 21172917), (3, 7057639), (37, 572241), (53, 399489), (59, 358863), (61, 347097), (111, 190747), (159, 133163), (177, 119621), (183, 115699), (1961, 10797), (2183, 9699), (2257, 9381), (3127, 6771), (3233, 6549), (3599, 5883)]