19684688

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{359}}^1$

素因数の和:539

約数の個数: 40

約数和(自身を含む): 40176000

約数和(自身を除く): 20491312

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 149, 184, 298, 359, 368, 596, 718, 1192, 1436, 2384, 2872, 3427, 5744, 6854, 8257, 13708, 16514, 27416, 33028, 53491, 54832, 66056, 106982, 132112, 213964, 427928, 855856, 1230293, 2460586, 4921172, 9842344, 19684688]

約数ペア:

[(1, 19684688), (2, 9842344), (4, 4921172), (8, 2460586), (16, 1230293), (23, 855856), (46, 427928), (92, 213964), (149, 132112), (184, 106982), (298, 66056), (359, 54832), (368, 53491), (596, 33028), (718, 27416), (1192, 16514), (1436, 13708), (2384, 8257), (2872, 6854), (3427, 5744)]