21693136

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71359}}^1$

素因数の和:71386

約数の個数: 20

約数和(自身を含む): 44243200

約数和(自身を除く): 22550064

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 71359, 142718, 285436, 570872, 1141744, 1355821, 2711642, 5423284, 10846568, 21693136]

約数ペア:

[(1, 21693136), (2, 10846568), (4, 5423284), (8, 2711642), (16, 1355821), (19, 1141744), (38, 570872), (76, 285436), (152, 142718), (304, 71359)]