21207459

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{593}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 35126784

約数和(自身を除く): 13919325

約数列:

[1, 3, 7, 13, 21, 39, 91, 131, 273, 393, 593, 917, 1703, 1779, 2751, 4151, 5109, 7709, 11921, 12453, 23127, 35763, 53963, 77683, 161889, 233049, 543781, 1009879, 1631343, 3029637, 7069153, 21207459]

約数ペア:

[(1, 21207459), (3, 7069153), (7, 3029637), (13, 1631343), (21, 1009879), (39, 543781), (91, 233049), (131, 161889), (273, 77683), (393, 53963), (593, 35763), (917, 23127), (1703, 12453), (1779, 11921), (2751, 7709), (4151, 5109)]