21421179

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{6781}}^1$

素因数の和:6809

約数の個数: 24

約数和(自身を含む): 34561072

約数和(自身を除く): 13139893

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 1053, 3159, 6781, 20343, 61029, 88153, 183087, 264459, 549261, 793377, 1647783, 2380131, 7140393, 21421179]

約数ペア:

[(1, 21421179), (3, 7140393), (9, 2380131), (13, 1647783), (27, 793377), (39, 549261), (81, 264459), (117, 183087), (243, 88153), (351, 61029), (1053, 20343), (3159, 6781)]