64631990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157639}}^1$

素因数の和:157687

約数の個数: 16

約数和(自身を含む): 119175840

約数和(自身を除く): 54543850

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 157639, 315278, 788195, 1576390, 6463199, 12926398, 32315995, 64631990]

約数ペア:

[(1, 64631990), (2, 32315995), (5, 12926398), (10, 6463199), (41, 1576390), (82, 788195), (205, 315278), (410, 157639)]