678940

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{409}}^1$

素因数の和:501

約数の個数: 24

約数和(自身を含む): 1446480

約数和(自身を除く): 767540

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 409, 415, 818, 830, 1636, 1660, 2045, 4090, 8180, 33947, 67894, 135788, 169735, 339470, 678940]

約数ペア:

[(1, 678940), (2, 339470), (4, 169735), (5, 135788), (10, 67894), (20, 33947), (83, 8180), (166, 4090), (332, 2045), (409, 1660), (415, 1636), (818, 830)]