131481920

素因数分解:

$2^6\times 5^1\times {\mathrm{641}}^2$

素因数の和:1299

約数の個数: 42

約数和(自身を含む): 313580526

約数和(自身を除く): 182098606

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 641, 1282, 2564, 3205, 5128, 6410, 10256, 12820, 20512, 25640, 41024, 51280, 102560, 205120, 410881, 821762, 1643524, 2054405, 3287048, 4108810, 6574096, 8217620, 13148192, 16435240, 26296384, 32870480, 65740960, 131481920]

約数ペア:

[(1, 131481920), (2, 65740960), (4, 32870480), (5, 26296384), (8, 16435240), (10, 13148192), (16, 8217620), (20, 6574096), (32, 4108810), (40, 3287048), (64, 2054405), (80, 1643524), (160, 821762), (320, 410881), (641, 205120), (1282, 102560), (2564, 51280), (3205, 41024), (5128, 25640), (6410, 20512), (10256, 12820)]