20868080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13729}}^1$

素因数の和:13761

約数の個数: 40

約数和(自身を含む): 51075600

約数和(自身を除く): 30207520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13729, 27458, 54916, 68645, 109832, 137290, 219664, 260851, 274580, 521702, 549160, 1043404, 1098320, 1304255, 2086808, 2608510, 4173616, 5217020, 10434040, 20868080]

約数ペア:

[(1, 20868080), (2, 10434040), (4, 5217020), (5, 4173616), (8, 2608510), (10, 2086808), (16, 1304255), (19, 1098320), (20, 1043404), (38, 549160), (40, 521702), (76, 274580), (80, 260851), (95, 219664), (152, 137290), (190, 109832), (304, 68645), (380, 54916), (760, 27458), (1520, 13729)]