21457916

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{349}}^1\times {\mathrm{809}}^1$

素因数の和:1181

約数の個数: 24

約数和(自身を含む): 39690000

約数和(自身を除く): 18232084

約数列:

[1, 2, 4, 19, 38, 76, 349, 698, 809, 1396, 1618, 3236, 6631, 13262, 15371, 26524, 30742, 61484, 282341, 564682, 1129364, 5364479, 10728958, 21457916]

約数ペア:

[(1, 21457916), (2, 10728958), (4, 5364479), (19, 1129364), (38, 564682), (76, 282341), (349, 61484), (698, 30742), (809, 26524), (1396, 15371), (1618, 13262), (3236, 6631)]