639883982

素因数分解:

$2^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{31991}}^1$

素因数の和:32203

約数の個数: 16

約数和(自身を含む): 980106912

約数和(自身を除く): 340222930

約数列:

[1, 2, 73, 137, 146, 274, 10001, 20002, 31991, 63982, 2335343, 4382767, 4670686, 8765534, 319941991, 639883982]

約数ペア:

[(1, 639883982), (2, 319941991), (73, 8765534), (137, 4670686), (146, 4382767), (274, 2335343), (10001, 63982), (20002, 31991)]