81718240

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{26881}}^1$

素因数の和:26915

約数の個数: 48

約数和(自身を含む): 203227920

約数和(自身を除く): 121509680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 26881, 53762, 107524, 134405, 215048, 268810, 430096, 510739, 537620, 860192, 1021478, 1075240, 2042956, 2150480, 2553695, 4085912, 4300960, 5107390, 8171824, 10214780, 16343648, 20429560, 40859120, 81718240]

約数ペア:

[(1, 81718240), (2, 40859120), (4, 20429560), (5, 16343648), (8, 10214780), (10, 8171824), (16, 5107390), (19, 4300960), (20, 4085912), (32, 2553695), (38, 2150480), (40, 2042956), (76, 1075240), (80, 1021478), (95, 860192), (152, 537620), (160, 510739), (190, 430096), (304, 268810), (380, 215048), (608, 134405), (760, 107524), (1520, 53762), (3040, 26881)]