21269456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{349}}^1$

素因数の和:663

約数の個数: 40

約数和(自身を含む): 44658600

約数和(自身を除く): 23389144

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 293, 349, 586, 698, 1172, 1396, 2344, 2792, 3809, 4537, 4688, 5584, 7618, 9074, 15236, 18148, 30472, 36296, 60944, 72592, 102257, 204514, 409028, 818056, 1329341, 1636112, 2658682, 5317364, 10634728, 21269456]

約数ペア:

[(1, 21269456), (2, 10634728), (4, 5317364), (8, 2658682), (13, 1636112), (16, 1329341), (26, 818056), (52, 409028), (104, 204514), (208, 102257), (293, 72592), (349, 60944), (586, 36296), (698, 30472), (1172, 18148), (1396, 15236), (2344, 9074), (2792, 7618), (3809, 5584), (4537, 4688)]