638564769

素因数分解:

$3^3\times {\mathrm{821}}^1\times {\mathrm{28807}}^1$

素因数の和:29637

約数の個数: 16

約数和(自身を含む): 947207040

約数和(自身を除く): 308642271

約数列:

[1, 3, 9, 27, 821, 2463, 7389, 22167, 28807, 86421, 259263, 777789, 23650547, 70951641, 212854923, 638564769]

約数ペア:

[(1, 638564769), (3, 212854923), (9, 70951641), (27, 23650547), (821, 777789), (2463, 259263), (7389, 86421), (22167, 28807)]