21953968

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{281}}^1$

素因数の和:565

約数の個数: 40

約数和(自身を含む): 45108720

約数和(自身を除く): 23154752

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 257, 281, 304, 514, 562, 1028, 1124, 2056, 2248, 4112, 4496, 4883, 5339, 9766, 10678, 19532, 21356, 39064, 42712, 72217, 78128, 85424, 144434, 288868, 577736, 1155472, 1372123, 2744246, 5488492, 10976984, 21953968]

約数ペア:

[(1, 21953968), (2, 10976984), (4, 5488492), (8, 2744246), (16, 1372123), (19, 1155472), (38, 577736), (76, 288868), (152, 144434), (257, 85424), (281, 78128), (304, 72217), (514, 42712), (562, 39064), (1028, 21356), (1124, 19532), (2056, 10678), (2248, 9766), (4112, 5339), (4496, 4883)]