216561639

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{542761}}^1$

素因数の和:542790

約数の個数: 16

約数和(自身を含む): 347367680

約数和(自身を除く): 130806041

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 542761, 1628283, 3799327, 10312459, 11397981, 30937377, 72187213, 216561639]

約数ペア:

[(1, 216561639), (3, 72187213), (7, 30937377), (19, 11397981), (21, 10312459), (57, 3799327), (133, 1628283), (399, 542761)]