81071921

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{461}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 98067816

約数和(自身を除く): 16995895

約数列:

[1, 7, 37, 49, 97, 259, 461, 679, 1813, 3227, 3589, 4753, 17057, 22589, 25123, 44717, 119399, 175861, 313019, 835793, 1654529, 2191133, 11581703, 81071921]

約数ペア:

[(1, 81071921), (7, 11581703), (37, 2191133), (49, 1654529), (97, 835793), (259, 313019), (461, 175861), (679, 119399), (1813, 44717), (3227, 25123), (3589, 22589), (4753, 17057)]