21653648

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79609}}^1$

素因数の和:79634

約数の個数: 20

約数和(自身を含む): 44422380

約数和(自身を除く): 22768732

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 79609, 159218, 318436, 636872, 1273744, 1353353, 2706706, 5413412, 10826824, 21653648]

約数ペア:

[(1, 21653648), (2, 10826824), (4, 5413412), (8, 2706706), (16, 1353353), (17, 1273744), (34, 636872), (68, 318436), (136, 159218), (272, 79609)]