1285200820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{905071}}^1$

素因数の和:905151

約数の個数: 24

約数和(自身を含む): 2736937728

約数和(自身を除く): 1451736908

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 905071, 1810142, 3620284, 4525355, 9050710, 18101420, 64260041, 128520082, 257040164, 321300205, 642600410, 1285200820]

約数ペア:

[(1, 1285200820), (2, 642600410), (4, 321300205), (5, 257040164), (10, 128520082), (20, 64260041), (71, 18101420), (142, 9050710), (284, 4525355), (355, 3620284), (710, 1810142), (1420, 905071)]