644680

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 1477440

約数和(自身を除く): 832760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 227, 284, 355, 454, 568, 710, 908, 1135, 1420, 1816, 2270, 2840, 4540, 9080, 16117, 32234, 64468, 80585, 128936, 161170, 322340, 644680]

約数ペア:

[(1, 644680), (2, 322340), (4, 161170), (5, 128936), (8, 80585), (10, 64468), (20, 32234), (40, 16117), (71, 9080), (142, 4540), (227, 2840), (284, 2270), (355, 1816), (454, 1420), (568, 1135), (710, 908)]