640913744

素因数分解:

$2^4\times {\mathrm{2011}}^1\times {\mathrm{19919}}^1$

素因数の和:21938

約数の個数: 20

約数和(自身を含む): 1242450240

約数和(自身を除く): 601536496

約数列:

[1, 2, 4, 8, 16, 2011, 4022, 8044, 16088, 19919, 32176, 39838, 79676, 159352, 318704, 40057109, 80114218, 160228436, 320456872, 640913744]

約数ペア:

[(1, 640913744), (2, 320456872), (4, 160228436), (8, 80114218), (16, 40057109), (2011, 318704), (4022, 159352), (8044, 79676), (16088, 39838), (19919, 32176)]