20938855

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^2$

素因数の和:128

約数の個数: 48

約数和(自身を含む): 32417280

約数和(自身を除く): 11478425

約数列:

[1, 5, 7, 19, 23, 35, 37, 95, 115, 133, 161, 185, 259, 437, 665, 703, 805, 851, 1295, 1369, 2185, 3059, 3515, 4255, 4921, 5957, 6845, 9583, 15295, 16169, 24605, 26011, 29785, 31487, 47915, 80845, 113183, 130055, 157435, 182077, 220409, 565915, 598253, 910385, 1102045, 2991265, 4187771, 20938855]

約数ペア:

[(1, 20938855), (5, 4187771), (7, 2991265), (19, 1102045), (23, 910385), (35, 598253), (37, 565915), (95, 220409), (115, 182077), (133, 157435), (161, 130055), (185, 113183), (259, 80845), (437, 47915), (665, 31487), (703, 29785), (805, 26011), (851, 24605), (1295, 16169), (1369, 15295), (2185, 9583), (3059, 6845), (3515, 5957), (4255, 4921)]