640065

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{601}}^1$

素因数の和:680

約数の個数: 16

約数和(自身を含む): 1040256

約数和(自身を除く): 400191

約数列:

[1, 3, 5, 15, 71, 213, 355, 601, 1065, 1803, 3005, 9015, 42671, 128013, 213355, 640065]

約数ペア:

[(1, 640065), (3, 213355), (5, 128013), (15, 42671), (71, 9015), (213, 3005), (355, 1803), (601, 1065)]