78868940

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{21787}}^1$

素因数の和:21977

約数の個数: 24

約数和(自身を含む): 166547472

約数和(自身を除く): 87678532

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 21787, 43574, 87148, 108935, 217870, 435740, 3943447, 7886894, 15773788, 19717235, 39434470, 78868940]

約数ペア:

[(1, 78868940), (2, 39434470), (4, 19717235), (5, 15773788), (10, 7886894), (20, 3943447), (181, 435740), (362, 217870), (724, 108935), (905, 87148), (1810, 43574), (3620, 21787)]