21013005

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{547}}^1$

素因数の和:765

約数の個数: 32

約数和(自身を含む): 36457344

約数和(自身を除く): 15444339

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 197, 547, 591, 985, 1641, 2561, 2735, 2955, 7111, 7683, 8205, 12805, 21333, 35555, 38415, 106665, 107759, 323277, 538795, 1400867, 1616385, 4202601, 7004335, 21013005]

約数ペア:

[(1, 21013005), (3, 7004335), (5, 4202601), (13, 1616385), (15, 1400867), (39, 538795), (65, 323277), (195, 107759), (197, 106665), (547, 38415), (591, 35555), (985, 21333), (1641, 12805), (2561, 8205), (2735, 7683), (2955, 7111)]