21957957

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4909}}^1$

素因数の和:4993

約数の個数: 24

約数和(自身を含む): 36766080

約数和(自身を除く): 14808123

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4909, 14727, 34363, 44181, 103089, 309267, 348539, 1045617, 2439773, 3136851, 7319319, 21957957]

約数ペア:

[(1, 21957957), (3, 7319319), (7, 3136851), (9, 2439773), (21, 1045617), (63, 348539), (71, 309267), (213, 103089), (497, 44181), (639, 34363), (1491, 14727), (4473, 4909)]