1311781840

素因数分解:

$2^4\times 5^1\times {\mathrm{16397273}}^1$

素因数の和:16397286

約数の個数: 20

約数和(自身を含む): 3049892964

約数和(自身を除く): 1738111124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 16397273, 32794546, 65589092, 81986365, 131178184, 163972730, 262356368, 327945460, 655890920, 1311781840]

約数ペア:

[(1, 1311781840), (2, 655890920), (4, 327945460), (5, 262356368), (8, 163972730), (10, 131178184), (16, 81986365), (20, 65589092), (40, 32794546), (80, 16397273)]