21297717

素因数分解:

$3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{4073}}^1$

素因数の和:4169

約数の個数: 24

約数和(自身を含む): 35590464

約数和(自身を除く): 14292747

約数列:

[1, 3, 7, 9, 21, 63, 83, 249, 581, 747, 1743, 4073, 5229, 12219, 28511, 36657, 85533, 256599, 338059, 1014177, 2366413, 3042531, 7099239, 21297717]

約数ペア:

[(1, 21297717), (3, 7099239), (7, 3042531), (9, 2366413), (21, 1014177), (63, 338059), (83, 256599), (249, 85533), (581, 36657), (747, 28511), (1743, 12219), (4073, 5229)]