21254312

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{139831}}^1$

素因数の和:139856

約数の個数: 16

約数和(自身を含む): 41949600

約数和(自身を除く): 20695288

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 139831, 279662, 559324, 1118648, 2656789, 5313578, 10627156, 21254312]

約数ペア:

[(1, 21254312), (2, 10627156), (4, 5313578), (8, 2656789), (19, 1118648), (38, 559324), (76, 279662), (152, 139831)]