81947440

素因数分解:

$2^4\times 5^1\times {\mathrm{727}}^1\times {\mathrm{1409}}^1$

素因数の和:2149

約数の個数: 40

約数和(自身を含む): 190925280

約数和(自身を除く): 108977840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 727, 1409, 1454, 2818, 2908, 3635, 5636, 5816, 7045, 7270, 11272, 11632, 14090, 14540, 22544, 28180, 29080, 56360, 58160, 112720, 1024343, 2048686, 4097372, 5121715, 8194744, 10243430, 16389488, 20486860, 40973720, 81947440]

約数ペア:

[(1, 81947440), (2, 40973720), (4, 20486860), (5, 16389488), (8, 10243430), (10, 8194744), (16, 5121715), (20, 4097372), (40, 2048686), (80, 1024343), (727, 112720), (1409, 58160), (1454, 56360), (2818, 29080), (2908, 28180), (3635, 22544), (5636, 14540), (5816, 14090), (7045, 11632), (7270, 11272)]