320155760

素因数分解:

$2^4\times 5^1\times {\mathrm{4001947}}^1$

素因数の和:4001960

約数の個数: 20

約数和(自身を含む): 744362328

約数和(自身を除く): 424206568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4001947, 8003894, 16007788, 20009735, 32015576, 40019470, 64031152, 80038940, 160077880, 320155760]

約数ペア:

[(1, 320155760), (2, 160077880), (4, 80038940), (5, 64031152), (8, 40019470), (10, 32015576), (16, 20009735), (20, 16007788), (40, 8003894), (80, 4001947)]