4155440

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{409}}^1$

素因数の和:549

約数の個数: 40

約数和(自身を含む): 9761280

約数和(自身を除く): 5605840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 409, 508, 635, 818, 1016, 1270, 1636, 2032, 2045, 2540, 3272, 4090, 5080, 6544, 8180, 10160, 16360, 32720, 51943, 103886, 207772, 259715, 415544, 519430, 831088, 1038860, 2077720, 4155440]

約数ペア:

[(1, 4155440), (2, 2077720), (4, 1038860), (5, 831088), (8, 519430), (10, 415544), (16, 259715), (20, 207772), (40, 103886), (80, 51943), (127, 32720), (254, 16360), (409, 10160), (508, 8180), (635, 6544), (818, 5080), (1016, 4090), (1270, 3272), (1636, 2540), (2032, 2045)]