640223997

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{983447}}^1$

素因数の和:983488

約数の個数: 16

約数和(自身を含む): 1007050752

約数和(自身を除く): 366826755

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 983447, 2950341, 6884129, 20652387, 30486857, 91460571, 213407999, 640223997]

約数ペア:

[(1, 640223997), (3, 213407999), (7, 91460571), (21, 30486857), (31, 20652387), (93, 6884129), (217, 2950341), (651, 983447)]